Webster's Revised Unabridged Dictionary · 1913

Twenty

Twenty (twen"ty) , adjective

[Old English twenty, Anglo-Saxon twēntig, twentig; akin to OFries. twintich, Old Saxon twēntig, Dutch & LG. twintig, Old High German zweinzug, German zwanzig, Gothic twai tigjis; that is, two tens. See Twain, Two, and Ten.]

1.
One more than nineteen; twice ten; as, twenty men.
2.
An indefinite number more or less that twenty. — Shakespeare
Maximilian, upon twenty respects, could not have been the man. — Bacon

Twenty ({not transcribed}) , noun

1.
The number next following nineteen; the sum of twelve and eight, or twice ten; twenty units or objects; a score.
2.
A symbol representing twenty units, as 20, or xx.