[1] : The Collaborative International Dictionary of English v.0.48

dyke \dyke\, n.
   see dike. the spelling dyke is restricted by some to the
   geological meaning.
   1913 webster
see also:
dike 

[2] : WordNet (r) 2.0

dyke
     n 1: offensive terms for a lesbian who is noticeably masculine
          syn: butch, dike
     2: a barrier constructed to contain the flow of water or to
        keep out the sea syn: dam, dike, levee
     v : enclose with a dike; "dike the land to protect it from
         water" syn: dike
see also:
butch dike dam levee 

[3] : Moby Thesaurus II by Grady Ward, 1.0

35 moby thesaurus words for "dyke":
   amazon, androgyne, auntie, bi-guy, bisexual, bull dyke, butch,
   catamite, chicken, fag, faggot, fairy, femme, flit, fricatrice,
   fruit, gunsel, homo, homophile, homosexual, homosexualist, hoyden,
   invert, lesbian, nance, pansy, pathic, punk, queen, queer, romp,
   sapphist, tomboy, tribade, virago

Dyke >> D Words
Dyke, definition of term: Dyke
dyke_pag1.html