|1.||a pipe, shaft, etc, that is used to convey smoke or gases, esp one that connects a furnace to a chimney|
|2.||mining another term for upcast|
|3.||taking up or lifting up|
|4.||the act of accepting or taking up something on offer or available|
|5.||informal quick on the uptake quick to understand or learn|
|6.||informal slow on the uptake slow to understand or learn|
uptake up·take (ŭp'tāk')
The absorption by a tissue of a substance, such as a nutrient, and its permanent or temporary retention.