1 [countable]TBC an area surrounded by a wall or fence, and used for a particular purpose :
the bear enclosure at the zoo
the bear enclosure at the zoo2 [uncountable]TBC the act of making an area separate by putting a wall or fence around it :
the enclosure of arable land for pasture
the enclosure of arable land for pasture3 [countable]TCM something that is put inside an envelope with a letter
