Dictionary
twen•ty-twen•ty
Pronunciation: (twen'tē-twen'tē, twun'tē-twun'tē), [key]—
adj.
1. Ophthalm.having normal visual acuity.
2. keenly or acutely perceptive:
an opinion based on twenty-twenty hindsight. Also,20-20.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.