the GNU version of the Collaborative International Dictionary of English
n. One who, or that which, grieves.
The Century Dictionary and Cyclopedia
n. One who or that which grieves or laments.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a person who is feeling grief (as grieving over someone who has died)
Word Usage
"The griever is expected, after missing a few days of work, to act normal, to show no emotion that may be seen as sad, maudlin, angry, or grief-stricken."