1st

denoting a quantity consisting of one more than sixteen and one less than eighteen; -- representing the number seventeen as Arabic numerals

coming next after the sixteenth in a series

one more than seventeen; denoting a quantity consisting of one more than seventeen and one less than nineteen; -- representing the number eighteen as Arabic numerals

coming next after the seventeenth in a series

one more than eighteen; denoting a quantity consisting of one more than eighteen and one less than twenty; -- representing the number nineteen as Arabic numerals

coming next after the eighteenth in a series

a class mail comprising letters, postcards, and other mail sealed against inspection, having a higher priority than second, third, or fourth-class mail; -- it is the highest class of mail not handled in a special manner, as is registered or priority mail.

Denoting a quantity consisting of one more than one; one plus one more; -- representing the number two as an Arabic numeral

a game in which a pitcher allows the opposing team only 2 hits.

one more than nineteen; denoting a quantity consisting of twenty items or units; -- representing the number twenty as Arabic numerals

coming next after the nineteenth in a series

one more than twenty; twenty plus one more; denoting a quantity consisting of twenty-one items or units; -- representing the number twenty-one as Arabic numerals