definition of
agent

[1] #1 agent n. an active and efficient cause; capable of producing a certain effect; "their research uncovered new disease agents". wn

[2] #2 agent n. a representative who acts on behalf of other persons or organizations. wn

[3] #3 agent n. a substance that exerts some force or effect. wn

[4] #4 agent n. [factor, broker] a businessman who buys or sells for another in exchange for a commission. wn

[5] #5 agent n. [federal agent] any agent or representative of a federal agency or bureau. wn