sorrow noun sor·row | \ ˈsär-(ˌ)ō , ˈsȯr- \ Definition of sorrow 1a : deep distress, sadness, or regret especially for the loss of someone or something loved b : resultant unhappy or unpleasant state to their great sorrow they could not marry 2 : a cause of grief or sadness 3 : a display of grief or sadness sorrow verb sorrowed; sorrowing; sorrows Definition of sorrow intransitive verb : to feel or express sorrow