1 duty, assignment, business, job, charge, stint, mission, work, chore, undertaking:
It will be your task to keep the others working.
2 (major) effort, test (of strength), piece of work, struggle, strain:
Getting him to do anything at all was quite a task.
3 take to task. scold, reprimand, call to account, blame, censure, recriminate, reproach, reprove, rebuke, criticize, lecture, upbraid, chide, reprehend:
I was taken to task for failing to notify the police of the break-in.