■ verb
1》 surround or close off on all sides.
↘ historical fence in (common land) so as to make it private property.
↘[as adjective ~d ] (of a religious order or other community) secluded from the outside world.
2》 ( ~ something in/within ) place an object inside (a container).
3》 place (something) in an envelope together with a letter.
Origin
ME: from OFr. enclos , past participle of enclore , based on L. includere 'shut in'.