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1. A fastening, as for a door or gate, typically consisting of a bar that fits into a notch or slot and is lifted from either side by a lever or string.
2. A spring lock, as for a door, that is opened from the outside by a key.
v. latched, latch·ing, latch·es
To close or lock with a latch.
1. To have or be closed with a latch.
2. To shut tightly so that the latch is engaged: a door too warped to latch.
latch on to/onto
1. To get hold of; obtain: latched on to a fortune in the fur trade.
2. To cling to.
[Middle English latche, from lacchen, to seize, from Old English læccan.]