Emily Dickinson Lexicon

MOURN, v.i. [Sax. murnan, myrnan; L. mæreo; allied perhaps to G. and D. murren, to murmur; Fr. morne, sad, sullen. See Murmur, and the root of amarus, bitter, Class Mr, No. 7.]

1. To express grief or sorrow; to grieve; to be sorrowful. Mourning may be expressed by weeping or audible sounds, or by sobs, sighs or inward silent grief. Abraham came to mourn for Sarah, and to weep. Gen. xxiii. Blessed are they that mourn, for they shall be comforted. Matth. v.
2. To wear the customary habit of sorrow. We mourn in black. Shak. Grieve for an hour perhaps, then mourn a year. Pope.