definition of
action

[1] #1 action n. something done (usually as opposed to something said); "there were stories of murders and other unnatural actions". wn

[2] #2 action n. [activity, activeness] the state of being active; "his sphere of activity"; "he is out of action". wn

[3] #3 action n. [military action] a military engagement; "he saw action in Korea". wn

[4] #4 action n. [natural process, natural action, activity] a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity". wn

[5] #5 action n. the series of events that form a plot; "his novels always have a lot of action". wn