WordNet (r) 3.0 (2006):
latch on v 1: take hold of or attach to; "The biochip latches onto the genes" 2: adopt; "take up new ideas" [syn: take up, latch on, fasten on, hook on, seize on] 3: understand, usually after some initial difficulty; "She didn't know what her classmates were plotting but finally caught on" [syn: catch on, get wise, get onto, tumble, latch on, cotton on, twig, get it]