Pronunciation: (up'tāk"), [key]
1. apprehension; understanding or comprehension; mental grasp: quick on the uptake.
2. an act or instance of taking up; a lifting: the uptake of fertilizer by machines.
3. Also called take-up. Mach.a pipe or passage leading upward from below, as for conducting smoke or a current of air.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.