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1 : a list of things to be considered or done
The committee set the agenda for the next several years of research.
There are several items/issues/things on the agenda for tonight’s meeting.
What’s the first/next item on the agenda?
Such an idea has been high on the political agenda for some time.
2 : a plan or goal that guides someone’s behavior and that is often kept secret
He wants to push/promote his own agenda no matter what the others say.
She had no hidden agenda. (=she didn’t have a secret plan)