WordNet (r) 3.0 (2006):
lock in v 1: close with or as if with a tight seal; "This vacuum pack locks in the flavor!" [syn: lock in, seal in] 2: place in a place where something cannot be removed or someone cannot escape; "The parents locked her daughter up for the weekend"; "She locked her jewels in the safe" [syn: lock in, lock away, lock, put away, shut up, shut away, lock up]