D defs.my
Entry 1 sense Webster, 1913

Underaction

· Un·der·ac·tion · IPA /ˌʌndəɹˈækʃən/
01 n. Subordinate action; a minor action incidental or subsidiary to the main story; an episode.
  1. 1.
    Subordinate action; a minor action incidental or subsidiary to the main story; an episode.
    “The least episodes or underactions . . . are parts necessary or convenient to carry on the main design.” Dryden.