1ST

 Dictionary entry overview: What does 1st mean? 

• 1ST (adjective)
  The adjective 1ST has 1 sense:

1. indicating the beginning unit in a series

  Familiarity information: 1ST used as an adjective is very rare.

 Dictionary entry details 

• 1ST (adjective)

Sense 1

Meaning:

Indicating the beginning unit in a series

Synonyms:

1st; first

Similar:

ordinal (being or denoting a numerical order in a series)

 Context examples 

The 1st letter of the Greek alphabet.

(Alpha, NCI Thesaurus)

A monounsaturated medium-chain fatty acid with a 12-carbon backbone and the sole double bond originating from the 1st, 2nd, 3rd, 5th, 6th, 8th or 10th position from the methyl end.

(Dodecenoic Acid, NCI Thesaurus)

The difference between the 3d and 1st quartiles is called the interquartile range and it is used as a measure of variability (dispersion).

(Interquartile Range, NCI Thesaurus)

A monounsaturated medium-chain fatty acid with a 12-carbon backbone and a single double bond originating from the 1st, 2nd, 3rd, 5th, 6th or 10th positions from the methyl end.

(Lauroleic Acid, NCI Thesaurus)

1st, The man-mountain shall not depart from our dominions, without our license under our great seal.

(Gulliver's Travels into several remote nations of the world, by Jonathan Swift)

Note: This study was based on January 1st population data per country.

(Is the Global Crisis Triggering Basic Instincts?, BOGDAN FLORIN PAUL)

That morning is the 1st of March, and on that morning I see the first sign of that after which the baby wolves are in search.

(Love of Life and Other Stories, by Jack London)

Left Munich at 8:35 P. M., on 1st May, arriving at Vienna early next morning; should have arrived at 6:46, but train was an hour late.

(Dracula, by Bram Stoker)

On May 1st the boy arrived, that being the beginning of the summer term.

(The Return of Sherlock Holmes, by Sir Arthur Conan Doyle)

Polyunsaturated fatty acid with 16 carbons and 4 double bonds at the 1st, 4th, 7th and 10th carbons from the methyl end.

(Hexadecatetraenoic Acid n-1, NCI Thesaurus/CRCH)