Webster's Dictionary 
(1): ( n.) A carnivorous animal of the Weasel family (Mustela Canadensis); the pekan; the "black cat."
(2): ( n.) One who fishes.
Easton's Bible Dictionary 
Luke 5:2 Matthew 4:19 Mark 1:17
King James Dictionary 
1. One who is employed in catching fish. 2. A species of weasel.
Cyclopedia of Biblical, Theological and Ecclesiastical Literature 
( דִּוָּג , Davvag', Jeremiah 16:16 [marg.]; Ezekiel 47:10; or דִּיָּג , Dayyag', Isaiah 19:8; Jeremiah 16:16 [text]; Gr. Ἁλιεύς , Seaman or sailor, hence fisherman, as rendered Luke 5:2), a term used, besides its literal import [(See Fishing), above], in the phrase "fishers of men" ( Matthew 19:1; Mark i, 17), as applied by our Saviour to the apostles (q.v.) in calling them to their office; and in a like typical manner, but in an unfavorable sense, the word occurs Jeremiah 16:16. The application of the figure is obvious (see Wemyss, Symbolical Dict. s.v.). On the "fisher's coat" ( Ἐπενδύτης , John 21:7), (See Coat).