Abbreviation of first. Assyrian Neo-Aramaic: ܐ. Danish: 1. Finnish: 1. Norwegian: 1. Shop antique furniture, fine jewelry, vintage fashion and art from top sellers around the world. Global shipping available. Serving the northern Indiana-southwestern Michigan area with nearly $8 billion in assets and more than 1100 employees, 1st Source is here for you. 1st United is a local credit union committed to improving the finance health of the communities we serve across the East Bay and Tri-Valley areas. When writing ordinal numbers such as 1st, 2nd, 3rd, etc. you should use the last two letters on the word as it would be if you wrote out the whole word. Below are the ordinal numbers both written out and with digits for 1-20. Ordinal numbers show the position or order of something in a list or sequence. Instead of telling “how many,” like regular counting numbers, they tell “which one.” For example, 1st means first place, 2nd means second in line, and 3rd means third position. Learn how to use ordinal numbers in English with clear grammar rules, common usage, and examples. Includes a full list from 1st to 100th. Here is the short answer, in case you are in a rush: '1st' is the correct numeric abbreviation of the ordinal first. '1th' is a grammatical error, and it should never be used. The brief overview will help you if you need to quickly decide which spelling to use, but there is more to learn. 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. In summary, “1st” is correct, and “1th” is an error—but don’t let that scare you! English can seem complicated with its rules and exceptions, but with regular practice and a good attitude, you’ll get the hang of it.