Definify.com

Webster 1913 Edition

Adj.

Half detached; partly distinct or separate.

Semidetached house

one of two tenements under a single roof, but separated by a party wall.

[Eng.]

See also: semi-detached

semidetached ‎(not comparable)

Alternative spelling of semi-detached
- 2007 March 4, David Scharfenberg, “Homey, if You Don’t Mind a Building Boom”, in New York Times:
  The houses, made of brick and siding, are generally smaller one- and two-family dwellings, many semidetached.

semidetached ‎(plural semidetacheds)

Alternative spelling of semi-detached
- 2013, Robert Barnard, A City of Strangers
  Semidetacheds and council housing estates alternated with the occasional high-rise block […]