1. [ adjective ] so lacking in interest as to cause mental weariness
Synonyms: dull boring tedious wearisome irksome tiresome slow ho-hum

"a boring evening with uninteresting people" "the deadening effect of some routine tasks" "a dull play" "a ho-hum speaker" "what an irksome task the writing of long letters is"- Edmund Burke

Related terms: uninteresting
2. [ noun ] the act of making something futile and useless (as by routine)
Synonyms: impairment constipation stultification
Related terms: degradation deaden
Similar spelling:   Dedmon