agenda (n.) Look up agenda at Dictionary.com
1650s, from Latin agenda, literally "things to be done," neuter plural of agendus, gerundive of agere "to do" (from PIE root *ag- (1) "to drive, draw out or forth, move"). Originally theological (opposed to matters of belief), sense of "items of business to be done at a meeting" first attested 1882. "If a singular is required (=one item of the agenda) it is now agendum, the former singular agend being obsolete" [Fowler].