A has 25 different meanings across 8 categories:
Noun · Character · Num · Symbol · Article · Prep · Pron · Particle
a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
Ace. (including in card games)
The name of the Latin script letter A/a.
Have.
Atom; atomic.
All.
All.
across
The first letter of the English alphabet, called a and written in the Latin script.
The first letter of the English alphabet, written in the Latin script.
The ordinal number first, derived from this letter of the English alphabet, called a and written in the Latin script.
The ordinal number first, derived from this letter of the English alphabet, called a and written in the Latin script.
A rank, normally the highest rank, on any of various scales that assign letters.
Distance from leading edge to aerodynamic center.
One; any indefinite example of; used to denote a singular item of a group.
To do with position or direction; In, on, at, by, towards, onto.
Of.
He, or sometimes she, it.
Alternative form of -a (“empty syllable added to songs, poetry, verse and other speech”)