let out verb 9let-out noun 2forms 3 verb9 •To release.The students were let out of school early.If you go into the aviary, don't let out any of the birds! •(US, Canada) Of a school: to finish for the day or term, allowing the pupils to go home.We're gonna have practice tomorrow morning for an assembly we're giving on Thursday before school lets out for Easter. — 1999 •Of sound, to emit.The dog let out a yelp. •To rent out.We let out the house and went on a two-year world trip. •To disclose.He accidentally let out the location for the meeting. •To enlarge by adjusting one or more seams.After the holidays he had to have his suits let out. •To allow to operate at higher speed by adjusting controls.He let out the reins when they were a mile from the barn.The engineer let out the throttle after the train crossed the bridge. •(slang, old-fashioned) To lay off or fire someone (from a job). •To begin to tell a story. let-out noun2 •The act or an instance of releasing or letting out something. •(UK, Ireland) An opportunity to avoid or escape from a difficult or unpleasant situation. formsletting out · lets out · let-outs