Webster's Dictionary






noun
a meaning
 the first letter of the English alphabet
 the first vertical row of squares from the left on a chessboard
 the first in a series
indef.art.
a meaning
 a single but unspecified person or thing (a Mr. Thomas)
 one (a teaspoonful of sugar)
 per (twice a week)
 any (he doesn't have a hope)
abbr.
a stands for
 acceleration
 about
 acre
noun
A meaning
 the best or highest in quality or rank (grade A eggs)
 the best or highest mark awarded for academic work (He received A grade in science)
 one of four common humanblood groups in the ABO system
 the sixth note of a scale in C major
symbol
A denotes
 10 (in hexadecimal notation)
 mass number (in Physics)
 activity (in Chemistry)
abbr.
A stands for
 academy
 adult
 ampere
 answer
 area
abbr.
Å stands for
 angstrom (a unit of length equal to 10-10 meters)