Entry 1 sense Webster, 1913 Resting · Rest·ing · IPA /ˈɹɛstɪŋ/ 01 a. & n. a. & n. from Rest, v. t. & i. 1. a. & n. from Rest, v. t. & i. See: Rest Phrases & compounds Resting spore — a spore in certain orders of algae, which remains quiescent, retaining its vitality, for long periods of time.