1. Not in accord with or not following current fashion
   "melodrama of a now unfashionable kind"; "unfashionable clothes";
   - unstylish, daggy [Austral, NZ, informal]
    
2. Unpopular and considered unappealing or unfashionable at the time
   "Bell-bottom pants were unfashionable by the 1980s";
   - out of fashion, daggy [Austral, NZ, informal]

See also: antique, dated, démodé, dowdy, ex, fogeyish, fogyish [informal], frumpish, frumpy, moss-grown [N. Amer, informal], mossy [N. Amer, informal], old, old-fashioned, old-hat [informal], out, outmoded, passé, passée, prehistoric, rinky-dink [N. Amer, informal], stick-in-the-mud [informal], stodgy, unpopular, vieux jeu

Antonym: fashionable