Source : Webster's Revised Unabridged Dictionary (1913)

Collier \Col"lier\, n. [OE. colier. See {Coal}.]
   1. One engaged in the business of digging mineral coal or
      making charcoal, or in transporting or dealing in coal.

   2. A vessel employed in the coal trade.

Source : WordNet®

collier
     See {colly}

collier
     n : someone who works in a coal mine [syn: {coal miner}, {pitman}]

colly
     v : make soiled, filthy, or dirty; "don't soil your clothes when
         you play outside!" [syn: {dirty}, {soil}, {begrime}, {grime},
          {bemire}] [ant: {clean}]
     [also: {collied}, {colliest}, {collier}]