D defs.my
Entry 2 senses Webster, 1913

Acting

/ăk'-tĭng/ · Act·ing · IPA /ˈæk.tɪŋ/
01 a. Operating in any way.
  1. 1.
    Operating in any way.
  2. 2.
    Doing duty for another; officiating; as, an acting superintendent.