1 (often foll. by with, in) a surround with a wall, fence, etc. b shut in on all sides.
2 fence in (common land) so as to make it private property.
3 put in a receptacle (esp. in an envelope together with a letter).
4 (usu. as enclosed adj.) seclude (a religious community) from the outside world.
5 esp. Math. bound on all sides; contain.
6 hem in on all sides.
Etymology: ME f. OF enclos past part. of enclore ult. f. L includere (as INCLUDE)
Useful english dictionary. 2012.