intransitive verb

1. to feel or express sorrow; lament; grieve
2. to grieve for someone who has died; specif., to manifest the conventional signs of such grief, as by wearing black clothes
3. to make the low, continuous sound of a dove

Etymology: ME mournen < OE murnan; akin to Goth *maúrnan, to be anxious < IE base *(s)mer-, to remember: see merit

transitive verb

1. to feel or express sorrow for (something regrettable)
2. to grieve for (someone who has died)
3. to utter in a manner expressing sorrow