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