hot cap: meaning, definition, pronunciation and examples
LowTechnical / Specialist
Quick answer
What does “hot cap” mean?
A small explosive device used to ignite the main charge in a firearm cartridge.
Audio
Pronunciation
Definition
Meaning and Definition
A small explosive device used to ignite the main charge in a firearm cartridge.
A small, sensitive primer component in a cartridge or firework that detonates upon impact or friction to initiate the main charge. Informally, can refer to a very short, intense news story or a brief period of extreme activity.
Dialectal Variation
British vs American Usage
Differences
No significant difference in core meaning. Usage is equally technical in both varieties. 'Cap' may be more familiar to British speakers in the context of toy 'cap guns'.
Connotations
Neutral technical term. May evoke historical firearms or military contexts.
Frequency
Extremely low in general discourse. Used almost exclusively by specialists (gunsmiths, ballisticians, pyrotechnicians).
Grammar
How to Use “hot cap” in a Sentence
[The/This] hot cap [ignites/detonates/initiates] [the main charge/the powder].Vocabulary
Collocations
Examples
Examples of “hot cap” in a Sentence
verb
British English
- [Not used as a verb]
American English
- [Not used as a verb]
adverb
British English
- [Not used as an adverb]
American English
- [Not used as an adverb]
adjective
British English
- [Not used attributively as an adjective]
American English
- [Not used attributively as an adjective]
Usage
Meaning in Context
Business
Virtually never used.
Academic
Used in historical, technical, or engineering papers on firearms/explosives.
Everyday
Extremely rare. Might be heard among shooting/hunting enthusiasts or historical reenactors.
Technical
Primary context. Refers to a specific component in ammunition and some pyrotechnics.
Vocabulary
Synonyms of “hot cap”
Strong
Neutral
Vocabulary
Antonyms of “hot cap”
Watch out
Common Mistakes When Using “hot cap”
- Confusing it with 'bottle cap' or 'hat'. Using it as an adjective phrase ('a hot cap' meaning a warm hat). Pluralising as 'hots caps' instead of 'hot caps'.
FAQ
Frequently Asked Questions
No, it is a low-frequency technical term used primarily in contexts relating to firearms, ammunition, and some types of fireworks.
Only in a non-standard, creative, or humorous sense. Its primary and technical meaning is related to explosives ignition. One might jokingly refer to a warm hat as a 'hot cap', but this is not the dictionary definition.
They are largely synonymous. 'Percussion cap' is the more common historical and technical term for the small copper cup containing explosive compound used in 19th-century firearms. 'Hot cap' is a less common term that can refer to this or similar initiators in modern contexts.
Most native speakers without specific interest in firearms, history, or pyrotechnics would not know the term. They might guess it refers to a warm hat.
A small explosive device used to ignite the main charge in a firearm cartridge.
Hot cap is usually technical / specialist in register.
Hot cap: in British English it is pronounced /ˌhɒt ˈkæp/, and in American English it is pronounced /ˌhɑːt ˈkæp/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[Not a common source for idioms]”
Learning
Memory Aids
Mnemonic
Think of a 'cap' on a bottle that gets very HOT and pops off violently to start a reaction.
Conceptual Metaphor
A SMALL TRIGGER FOR A LARGER EVENT (e.g., 'The scandal was the hot cap that ignited public outrage.')
Practice
Quiz
In which field is the term 'hot cap' primarily used?