What does alcove mean?
The definition of alcove
Al”cove, n.
Etym: [F. alcôve, Sp. or Pg. alcoba, from Ar. al-quobbah arch, vault, tent.]

1 (Arch.)
A recessed portion of a room, or a small room opening into a larger one; especially, a recess to contain a bed; a lateral recess in a library.
2 A small ornamental building with seats, or an arched seat, in a pleasure ground; a garden bower. Cowper.
3 Any natural recess analogous to an alcove or recess in an apartment. The youthful wanderers found a wild alcove. Falconer.