[swan] n, pl swans [ME, fr. OE; akin to MHG swan and perh. to L sonus sound--more at sound] (bef. 12c) 1 pl also swan : any of various large heavy-bodied long-necked mostly pure white aquatic birds (family Anatidae and esp. genus Cygnus) that are related to but larger than the geese
2: one that resembles or is likened to a swan 3 cap: the constellation Cygnus
[2]swan vi swanned ; swan.ning (1942): to wander aimlessly or idly: dally [3]swan vi swanned ; swan.ning [perh. euphemism for swear] (1784) dial: declare, swear