squab

1. A young, newly hatched, or unfledged pigeon.
2. 1. A soft, thick cushion, as for a couch.
   2. A couch.

[Probably of Scandinavian origin, akin to Swedish dialectal squabb, fat flesh.]

Young pigeon; squab pie is a west of England dish made from meat, apples, and onions.

[SKWAHB] A young (about 4 weeks old) domesticated pigeon that has never flown and is therefore extremely tender. It was a popular special-occasion dish in Victorian England. Squabs usually weigh 1 pound or less and have delicately flavored dark meat. Fresh squab is available throughout the summer months (year-round in some regions) in gourmet markets. Frozen squab is marketed year-round. Choose fresh birds by their plump, firm appearance. Store as for chicken. Likewise, squab can be prepared in any manner suitable for chicken. A classic method is to stuff and roast it.

Baby or fledgling pigeon.

The noun has 3 meanings:

Meaning #1: flesh of a pigeon suitable for roasting or braising; flesh of a dove (young squab) may be broiled
  Synonym: dove

Meaning #2: a soft padded sofa

Meaning #3: an unfledged pigeon

The adjective squab has one meaning:

Meaning #1: short and fat
  Synonym: squabby