I. act ‧ ing 1 /ˈæktɪŋ/ BrE AmE adjective
[ Word Family: noun : ↑ act , ↑ action ≠ ↑ inaction , ↑ activity ≠ ↑ inactivity , ↑ reaction , ↑ interaction , ↑ overacting ; adjective : ↑ acting , ↑ active ≠ ↑ inactive ; verb : ↑ act ≠ ↑ overact ; adverb : ↑ actively ]
acting manager/head teacher/director etc someone who does an important job while the usual person is not there, or until a new person is chosen for the job
II. acting 2 BrE AmE noun [uncountable]
the job or skill of performing in plays and films ⇨ drama