Pronunciation: (lach), [key]
a device for holding a door, gate, or the like, closed, consisting basically of a bar falling or sliding into a catch, groove, hole, etc.

to close or fasten with a latch.

1. to close tightly so that the latch is secured: The door won't latch.
2. latch on,
a. to grab or hold on, as to an object or idea, esp. tightly or tenaciously.
b. to include or add in; attach: If we latch the tax on, the bill will come to over $100.
3. latch onto, Informal.
a. to take possession of; obtain; get.
b. to acquire understanding of; comprehend.
c. to attach oneself to; join in with: The stray dog latched onto the children and wouldn't go home.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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