Definition of "mourn" []

• To feel or express grief or sorrow. See Synonyms at grieve. (verb-intransitive)
• To show grief for a death by conventional signs, as by wearing black clothes. (verb-intransitive)
• To make a low, indistinct, mournful sound. Used especially of a dove. (verb-intransitive)
• To feel or express deep regret for: mourned the wasted years. (verb-transitive)
• To grieve over (someone who has died). (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "To mourn is to express regret and he regrets nothing."
• "To mourn is to (1) feel or express grief or sorrow; (2) to show the customarysigns of grief for a death, to wear mourning clothes; (3) to murmur mournfully; (1) to feel or express grief or sorrow for."
• "WHEREAS, the people of Wisconsin mourn the death of Gunnery Sergeant Richard W. Fischer; and"