Noun doer has 1 sense
  1. actor, doer, worker - a person who acts and gets things done; "he's a principal actor in this affair"; "when you want something done get a doer"; "he's a miracle worker"
    --1 is a kind of person, individual, someone, somebody, mortal, human, soul
    --1 has particulars:
     demon; eager beaver, busy bee, live wire, sharpie, sharpy; energizer, energiser, vitalizer, vitaliser, animator; go-getter, whizz-kid, whiz-kid, ball of fire; man of action, man of deeds; powerhouse, human dynamo, ball of fire, fireball
    Derived forms: verb do3, verb do2