expletive
//ˈɛksplətɪv//
Noun
expletiveSingular
expletivesPlural
1
A swear word or profane expression, typically used to express strong emotion such as anger or frustration.
He muttered an expletive when he stubbed his toe.
2
A word or phrase used to fill out a sentence or metrical line without adding to the sense, such as 'it' in 'it is raining'.
In the sentence 'It is raining,' the word 'it' is an expletive that serves no semantic purpose.
Adjective
expletiveCanonical form
1
Serving to fill out or complete, especially in grammar or syntax.
In the sentence 'It is raining,' the word 'it' is an expletive subject.