The Collaborative International Dictionary of English v.0.48:

Singer \Sin"ger\ (s[i^]n"j[~e]r), n. [From Singe.]
   One who, or that which, singes. Specifically:
   (a) One employed to singe cloth.
   (b) A machine for singeing cloth.
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Singer \Sing"er\, n. [From Sing.]
   One who sings; especially, one whose profession is to sing.
   [1913 Webster]

WordNet (r) 3.0 (2006):

singer
    n 1: a person who sings [syn: singer, vocalist, vocalizer,
         vocaliser]
    2: United States inventor of an improved chain-stitch sewing
       machine (1811-1875) [syn: Singer, Isaac M. Singer, Isaac
       Merrit Singer]
    3: United States writer (born in Poland) of Yiddish stories and
       novels (1904-1991) [syn: Singer, Isaac Bashevis Singer]