Emily Dickinson Lexicon

MOURN, v.t.

1. To grieve for; to lament. But there is an ellipsis of for, the verb not being transitive. When we say, we mourn a friend or a child, the real sense and complete phrase is, we mourn for a friend, or mourn for the loss of a friend. “He mourned his rival's ill success,” that is, be mourned for his rival's ill success. Addison.
2. To utter in a sorrowful manner. The love-lorn nightingale / Nightly to thee her sad song mourneth well. Milton.