Source : Webster's Revised Unabridged Dictionary (1913)

Laborer \La"bor*er\, n. [Written also labourer.]
   One who labors in a toilsome occupation; a person who does
   work that requires strength rather than skill, as
   distinguished from that of an artisan.

Source : WordNet®

laborer
     n : someone who works with their hands; someone engaged in
         manual labor [syn: {manual laborer}, {labourer}, {jack}]