Source : Webster's Revised Unabridged Dictionary (1913)

Dolor \Do"lor\, n. [OE. dolor, dolur, dolour, F. douleur, L.
   dolor, fr. dolere. See 1st {Dole}.]
   Pain; grief; distress; anguish. [Written also {dolour}.]
   [Poetic]

         Of death and dolor telling sad tidings.  --Spenser.

Source : WordNet®

dolour
     n : (poetry) painful grief [syn: {dolor}]