noun · verb · 5 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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Received-Pronunciation:/ˌʌndəːˈfaɪəɹɪŋ/
Southern-England:Recorded audio is listed in the source snapshot.
General-American:/ˌʌndɚˈfaɪəɹɪŋ/
General-American:/ˌʌndɚˈfaɪɹɪŋ/
rhymes with -aɪəɹɪŋ
1
noun
Meaning 1
Intentional operation of a boiler, furnace, oven, etc., at a low level.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: overfiring
2
noun
Meaning 2
The state of not burning fuel at the desired level, and thus not providing heat efficiently.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: overfiring
3
noun
Meaning 3
Heating from below.
Definition source: English Wiktionary via Wiktextract
Usage: also, attributive, uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: overfiring
4
noun
Meaning 4
The state of being insufficiently fired or underfired.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: overfiring
5
verb
Meaning 5
present participle and gerund of underfire
Definition source: English Wiktionary via Wiktextract
Usage: form-of, gerund, participle, present
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
History
Etymology
From under- (prefix meaning ‘beneath; insufficient’) + firing, or underfire + -ing (suffix forming nouns from verbs denoting the act of doing something, an action, or the embodiment of an action).
See the etymology of the corresponding lemma form.