1(of a person) calm and self-controlled:outwardly they are cool, calm, and collected
2 [attributive] (of individual works) brought together in one volume or edition:the collected works of Shakespeare
(of a volume or edition) containing all the works of a particular person or category:the first collected edition of Mozart’s works
3(of a horse) moving with a shortened stride and with its hind legs correctly placed to achieve balance and impulsion:many top riders that instinctively ride a horse collected cannot explain the theory