'latch on' definitions:

Definition of 'latch on'

(from WordNet)
verb
Take hold of or attach to; "The biochip latches onto the genes"
verb
Adopt; "take up new ideas" [syn: take up, latch on, fasten on, hook on, seize on]
verb
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]