noun · 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:/fluːˈɪd.ə.ti/
Received-Pronunciation:/fluːˈɪd.ɪ.ti/
Canada, General-American:/fluˈɪd.ə.ti/
Canada, General-American:[fluˈɪɾ.ə.ti]
Canada, General-American:[fluˈɪɾ.ə.ɾi]
US:Recorded audio is listed in the source snapshot.
Australian:/flʉːˈɪd.ə.ti/
Australian:[flʉːˈɪɾ.ə.ti]
Australian:[flʉːˈɪɾ.ə.ɾi]
New-Zealand:/flʉːˈəd.ə.ti/
New-Zealand:[flʉːˈəɾ.ə.ti]
New-Zealand:[flʉːˈəɾ.ə.ɾi]
rhymes with -ɪdəti
CMU ARPABET:F L UW0 IH1 D AH0 T IY0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
The state of being fluid rather than viscous
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
A measure of the extent to which something is fluid. The reciprocal of its viscosity.
Definition source: English Wiktionary via Wiktextract
Usage: countable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
The quality of being fluid or free-flowing
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
a changeable quality
Definition source: Princeton WordNet 3.0
Examples
a charming Oriental fluidity of manner
a certain fluidness in his perception of time made him an unpredictable colleague
demographers try to predict social fluidity
Meaning relationships
Synonyms: fluidness
Antonyms: none provided
Broader terms: changeableness, changeability
5
noun
Meaning 5
the property of flowing easily
Definition source: Princeton WordNet 3.0
Examples
adding lead makes the alloy easier to cast because the melting point is reduced and the fluidity is increased
they believe that fluidity increases as the water gets warmer
