latch

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latch / lach/ • n. a metal bar with a catch and lever used for fastening a door or gate. ∎  a spring lock for an outer door that catches when the door is closed and can only be opened from the outside with a key. ∎  Electr. a circuit that retains whatever output state results from a momentary input signal until reset by another signal. ∎  the part of a knitting machine needle that closes or opens to hold or release the wool. • v. [tr.] fasten (a door or gate) with a latch: she latched the door carefully. ∎  [intr.] Electr. (of a device) become fixed in a particular state. PHRASAL VERBS: latch onto inf. attach oneself to (someone) as a constant and usually unwelcome companion: a knack for latching onto people with greater initiative and enterprise. ∎  take up (an idea or trend) enthusiastically: the media have latched onto the snappy “Generation X” catchphrase. ∎  (of one substance) cohere with (another).

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latch An electronic device that can store temporarily a single bit of data. It can be considered as an extension of a simple flip-flop. The storage is controlled by a clock signal, a given transition of which fixes the contents of the latch at the current value of its input. The contents will remain fixed until the next transition of the clock.

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latch
A. (dial.) loop, noose;

B. fastening for door or gate. XIV. In sense A prob. var. of LACE (OF. var. lache of laz); in sense B prob. f. (dial.) latch vb. OE. læċċan seize, grasp, perh. rel. to Gr. lázesthai.

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latchattach, batch, catch, crosshatch, detach, hatch, latch, match, mismatch, natch, outmatch, patch, scratch, snatch, thatch •Lukács • eyepatch • crosspatch •sasquatch

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