The Collaborative International Dictionary of English v.0.48:

Cubby \Cub"by\ (k?b"b?), Cubbyhole \Cub"by*hole`\ (-h?l`), n.
   [See Cub a stall.]
   A snug or confined or secluded place; a small room or a snug
   space within a room.

   Syn: snuggery, snug.
        [1913 Webster +PJC]

The Collaborative International Dictionary of English v.0.48:

cubbyhole \cubbyhole\ n.
   a small compartment.

   Syn: pigeonhole.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

cubbyhole
    n 1: a small compartment [syn: cubbyhole, pigeonhole]
    2: a small secluded room [syn: cubby, cubbyhole, snuggery,
       snug]