Ordinal numbers are numbers that show position or order in a sequence. For example, the words first and twentieth are ordinal numbers, as are numerals with suffixes at the end like 1st and 20th. Learn how to use ordinal numbers in English with clear grammar rules, common usage, and examples. Includes a full list from 1st to 100th. Define 1st. 1st synonyms, 1st pronunciation, 1st translation, English dictionary definition of 1st. Adj. 1. 1st - indicating the beginning unit in a series first ordinal - being or denoting a numerical order in a series; ordinal numbers ; held an ordinal. Abbreviation of first. Assyrian Neo-Aramaic: ܐ. Danish: 1. Finnish: 1. Norwegian: 1. First most commonly refers to: First or 1st may also refer to: Search for First or 1st on Wikipedia. La 1ère (disambiguation) (French: La Première, lit. 'The First') This disambiguation page lists articles associated with the title First. /fəst/ IPA guide Other forms: 1stly Definitions of 1st adjective indicating the beginning unit in a series synonyms: first Alternative form of 1st. The meaning of FIRST is preceding all others in time, order, or importance. How to use first in a sentence. Ordinal numbers may be written in English with numerals and letter suffixes: 1st, 2nd or 2d, 3rd or 3d, 4th, 11th, 21st, 101st, 477th, etc., with the suffix acting as an ordinal indicator. Shop antique furniture, fine jewelry, vintage fashion and art from top sellers around the world. Global shipping available.