latch
B2Neutral to slightly technical.
Definition
Meaning
A fastening device on a door or gate, typically a bar that falls into a notch.
A mechanism for maintaining an electronic circuit in a particular state; to attach oneself or become firmly connected to something.
Linguistics
Semantic Notes
Noun refers to a mechanical device; verb implies a secure, often simple, connection.
Dialectal Variation
British vs American Usage
Differences
Minimal differences in core meaning. The phrase "latch on to" is slightly more frequent in UK English.
Connotations
Neutral in both varieties; suggests simplicity and security.
Frequency
Equally common in general use. More frequent in technical contexts (electronics) in US English.
Vocabulary
Collocations
Grammar
Valency Patterns
[latch + object] (transitive)[latch + on + to + object] (phrasal verb)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “latch on to (an idea)”
- “leave the door on the latch”
Usage
Context Usage
Business
Used metaphorically: 'The new startup latched onto a lucrative niche market.'
Academic
Rare; may appear in technical descriptions of mechanisms or in psychology ('attachment theory').
Everyday
Primarily for doors, gates, and windows.
Technical
In electronics: 'a latch circuit'; in computing: 'a memory latch'.
Examples
By Part of Speech
verb
British English
- Make sure the gate latches properly when you shut it.
- The child latched onto his mother's leg in the crowd.
American English
- The trailer latches to the hitch with a simple lever.
- He quickly latched onto the trend and started a blog.
adverb
British English
- N/A
American English
- N/A
adjective
British English
- The latch mechanism is broken.
- It's a latch-key child.
American English
- Check the latch position.
- He was a latchkey kid.
Examples
By CEFR Level
- Please close the door and push the latch down.
- The garden gate has a small latch.
- I heard the latch click as he closed the door behind him.
- The baby latched onto her toy and wouldn't let go.
- The system uses an electronic latch to maintain the signal.
- Critics were quick to latch onto the politician's minor error.
- The contract contains a clause that allows investors to latch onto future profits.
- His mind latched onto the problem with a tenacity that surprised his colleagues.
Learning
Memory Aids
Mnemonic
Imagine a LATCH "catching" a door to keep it closed. Think of the 'tch' sound like the 'click' it makes.
Conceptual Metaphor
GRASPING IS UNDERSTANDING / 'latch on to an idea'; SECURITY IS CLOSURE.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Not "защелка" in all contexts. For a more complex lock, use 'lock' (замок). 'Latch' implies a simple mechanical catch.
Common Mistakes
- Confusing 'latch' with 'lock' (a latch is simpler, often without a key).
- Using 'latch' as a verb without the necessary particle ('on to' or 'onto').
Practice
Quiz
In electronics, what does a 'latch' primarily do?
FAQ
Frequently Asked Questions
A latch is a simple fastening device (like a bar that falls into place), often operated from one side only. A lock is a more complex securing device, usually requiring a key, combination, or electronic code to open.
Yes, especially in the phrasal verb 'latch on to,' meaning to grasp or understand an idea, or to attach oneself to a person or group.
It is a recognized term describing a child who returns to an empty home, but its usage has declined somewhat. 'Latchkey kid' is a common variant.
It is pronounced /lætʃ/, rhyming with 'catch' and 'patch', in both British and American English.