WordNet (r) 3.0 (2006):
fill up v 1: make full, also in a metaphorical sense; "fill a container"; "fill the child with pride" [syn: fill, fill up, make full] [ant: empty] 2: become full; "The pool slowly filled with water"; "The theater filled up slowly" [syn: fill, fill up] [ant: discharge, empty] 3: fill or stop up; "Can you close the cracks with caulking?" [syn: close, fill up] 4: eat until one is sated; "He filled up on turkey" [syn: fill up, fill]