a. | 1. | Filling up; hence, added merely for the purpose of filling up; superfluous. |
n. | 1. | A word, letter, or syllable not necessary to the sense, but inserted to fill a vacancy; an oath. |
Noun | 1. | expletive - profane or obscene expression usually of surprise or anger; "expletives were deleted" |
2. | expletive - a word or phrase conveying no independent meaning but added to fill out a sentence or metrical line |