Anything measuring three units, as length.
Three o'clock, either a.m. or p.m.
A person who is three years old.
The playing card featuring three pips.
The digit/figure 3.
A numerical value after two and before four. Represented in Arabic digits as 3; this many dots (•••).
Describing a set or group with three elements.
An algebraic variety of dimension 3.
by a factor of three
To make threefold; to triple.
triple
three times as great