The Oxford Thesaurus An A-Z Dictionary of Synonyms - assignmentn.

1) allotment, allocation, apportionment, giving (out) , distribution: Assignment of posts in the Cabinet is the responsibility of the Prime Minister. 2) task, obligation, responsibility, chore, duty, position, post, charge, job, mission, commission; lesson, homework: Every agent is expected to carry out his assignment. The school assignment for tomorrow is an essay on Alexander Pope. 3) appointment, designation, naming, nomination: The assignment of Neil Mackay to the post was a stroke of genius. 4) designation, specification, ascription: In ancient medicine, the assignment of the functions of the organs was often wrong.