Observing; watchful.

One who observes or takes notice.

A place or building for making observations on the heavenly bodies.

To take notice; to give attention to what one sees or hears; to attend.

perceived with the eyes and sometimes with other senses; as, no explanation for the observed phenomena.

One who observes, or pays attention to, anything; especially, one engaged in, or trained to habits of, close and exact observation; as, an astronomical observer.

The office or work of an observer.

Giving particular attention; habitually attentive to what passes; observant{1}; as, an observing person; an observing mind.

To be excessively or persistently preoccupied with something; -- usually used with on or over; as, to obsess over an imagined insult.

having or showing excessive or compulsive concern; -- used with with.

The act of besieging.

Persistently and abnormally preoccupied with some unreasonable idea.

A kind of glass produced by volcanoes. It is usually of a black color, and opaque, except in thin splinters.

Of or pertaining to a siege.

A sealing up.

To seal; to confirm, as by a seal or stamp.

To seal; to ratify.

The act of sealing or ratifying; the state of being sealed or confirmed; confirmation, as by the Holy Spirit.

Ratifying; confirming by sealing.

To become obsolescent.

The state of becoming obsolete.

Going out of use; becoming obsolete; passing into desuetude.

To become obsolete; to go out of use.

In an obsolete manner.

The state of being obsolete, or no longer used; a state of desuetude.

A disused word or phrase; an archaism.

That which stands in the way, or opposes; anything that hinders progress; a hindrance; an obstruction, physical or moral.

Opposition; impediment; obstruction.

Of or pertaining to childbirth, midwifery, or the period around the time of the birth of children; as, the obstetric art.

To assist as a midwife.

The act of assisting as a midwife; delivery.

One skilled in obstetrics; an accoucheur; especially, a physician who specializes in obstetrics.

Serving to assist childbirth; obstetric; hence, facilitating any bringing forth or deliverance.

The science of midwifery.

Obstetrics.

A fixedness in will, opinion, or resolution that can not be shaken at all, or only with great difficulty; firm and usually unreasonable adherence to an opinion, purpose, or system; unyielding disposition; stubborness; pertinacity; persistency; contumacy.

Pertinaciously adhering to an opinion, purpose, or course; persistent; not yielding to reason, arguments, or other means; stubborn; pertinacious; -- usually implying unreasonableness.

Obstinacy; stubbornness.

The act of stopping up, as a passage.

Attended by, or making, a loud and tumultuous noise; clamorous; noisy; vociferous.

The state of being constrained, bound, or obliged; that which constrains or obliges; obligation; bond.

To constrain; to put under obligation.

One who obstructs or hinders.

The act of obstructing, or state of being obstructed.

The act or the policy of obstructing progress.

One who deliberately hinders progress; one who obstructs business, as in a legislative body. Of or pertaining to obstructionists; causing obstruction; as, obstructionist tactics.

An obstructive person or thing.

Anything that obstructs or closes a passage; esp., that which obstructs natural passages in the body; as, a medicine which acts as an obstruent.

See Stupefaction.

Stupefactive.

See Stupefy.

To gain or have a firm footing; to be recognized or established; to become prevalent or general; to prevail; as, the custom obtains of going to the seashore in summer.

Capable of being obtained.

One who obtains.

The act or process of obtaining; attainment.

Covered; protected.

To obey (a judgment or decree).

To obey.

To oppose; to hold out in opposition.

The act of darkening; the state of being darkened; darkness.

To protest.

The act of obtesting; supplication; protestation.

Slander; detraction; calumny.

To thrust one's self upon a company or upon attention; to intrude.

One who obtrudes.

To deprive of a limb; to lop.

The act of lopping or cutting off.

The act of obtruding; a thrusting upon others by force or unsolicited; as, the obtrusion of crude opinions on the world.

One who practices or excuses obtrusion.

Disposed to obtrude; inclined to intrude or thrust one's self or one's opinions upon others, or to enter uninvited; forward; pushing; intrusive.

To reduce the edge, pungency, or violent action of; to dull; to blunt; to deaden; to quell; as, to obtund the acrimony of the gall.

A substance which sheathes a part, or blunts irritation, usually some bland, oily, or mucilaginous matter; -- nearly the same as demulcent.

That which obtunds or blunts; especially, that which blunts sensibility.

To stop or close, as an opening; to stop (a gun breech) so as to prevent the escape of gas in firing.

The act of stopping up, or closing, an opening.

Serving as an obturator; closing an opening; pertaining to, or in the region of, the obturator foramen; as, the obturator nerve.

See Obstuseangular.

Not pointed or acute; blunt; -- applied esp. to angles greater than a right angle, or containing more than ninety degrees.

Having an obtuse angle; as, an obtuse-angled triangle.

In an obtuse manner.

State or quality of being obtuse.

The act or process of making obtuse or blunt.

Obtuseness.

Overhanging; as, obumbrant feathers.

To shade; to darken; to cloud.

Act of darkening or obscuring.

Hooked or crooked in an extreme degree.

The act of happening incidentally; that which happens casually; an incidental advantage; an occasional offering.

Conversant; familiar.

The face of a coin which has the principal image or inscription upon it; -- the other side being the reverse.

In an obverse manner.

The act of turning toward or downward.

To turn toward.

making impossible or unnecessary.

The act of obviating, or the state of being obviated.

Opposing; fronting.

Overlapping; contorted; convolute; -- applied primarily, in botany, to two opposite leaves, each of which has one edge overlapping the nearest edge of the other, and secondarily to a circle of several leaves or petals which thus overlap.

See Obi.

A Peruvian name for certain species of Oxalis (Oxalis crenata, and Oxalis tuberosa) which bear edible tubers.

A kind of small simple wind instrument.

An alloy imitating gold or silver.

To give occasion to; to cause; to produce; to induce; as, to occasion anxiety.

Capable of being occasioned or caused.

Occuring at times, but not constant, regular, or systematic; made or happening as opportunity requires or admits; casual; incidental; as, occasional remarks, or efforts.

The system of occasional causes; -- a name given to certain theories of the Cartesian school of philosophers, as to the intervention of the First Cause, by which they account for the apparent reciprocal action of the soul and the body.

Quality or state of being occasional; occasional occurrence.

In an occasional manner; on occasion; at times, as convenience requires or opportunity offers; not regularly.

To occasion.

One who, or that which, occasions, causes, or produces.

Of or pertaining to the setting sun; falling; descending; western.

The act of making blind, or the state of being blind.

The part of the horizon where the sun last appears in the evening; that part of the earth towards the sunset; the west; -- opposed to orient. Specifically, in former times, Europe as opposed to Asia; now, also, the Western hemisphere.

Of, pertaining to, or situated in, the occident, or west; western; -- opposed to oriental; as, occidental climates, or customs; an occidental planet.

Western Christians of the Latin rite. See Orientals.

Western; occidental.

The occipital bone.

Of or pertaining to the occipital bone and second vertebra, or axis.

The back, or posterior, part of the head or skull; the region of the occipital bone.

A killing; the act of killing.

To shut up; to close.