Relief or support in mental distress or affliction; consolation, solace, soothing
Again the Oxford English Dictionary definition that most suits me.
In my work I use the word comfort to suggest both an easing or soothing of psychic distress. It is not used in the sense of making one completely comfortable, but is rather a small pulling back from pain that brings with it a modicum of relief. A secondary use within my work, is that of comfort as a physical manifestation, in particular warmth, such as may be obtained from a quilt, or as some may call it, a comforter.