D defs.my
Entry 2 senses · 2 variants Webster, 1913

Expletive

/ĕk'-splət-ĭv/ · Ex·ple·tive · IPA /ˈɛksplətɪv/
01 a. Filling up; hence, added merely for the purpose of filling up; superfluous.
  1. 1.
    Filling up; hence, added merely for the purpose of filling up; superfluous.
    Expletive phrases to plump his speech.” Barrow.
02 n. A word, letter, or syllable not necessary to the sense, but inserted to fill a vacancy; an oath.
  1. 1.
    A word, letter, or syllable not necessary to the sense, but inserted to fill a vacancy; an oath.
    “While explectives their feeble aid to join, And ten low words oft creep in one dull line.” Pope.