Definition of: grieve

(grēv) v. grieved, griev·ing v.t.
1. To cause great sorrow or grief to; make sad.
2. Obs. To injure or offend.
—v.i.
3. To feel sorrow or grief; mourn; lament. See synonyms under HURT, MOURN. [<OF grever <L gravare oppress <gravis heavy]
—griev′er noun
—griev′·ing adjective
—griev′ing·ly adverb