(adj) so lacking in interest as to cause mental weariness; ; ; ; ; ; - Edmund Burke; ; - Mark Twain, Syn. tiresome, irksome, dull, ho-hum, slow, wearisome, tedious, deadening, Example:a boring evening with uninteresting people; the deadening effect of some routine tasks; a dull play; his competent but dull performance; a ho-hum speaker who couldn't capture their attention; what an irksome task the writing of long letters is; tedious days on the train; the tiresome chirping of a cricket; other people's dreams are dreadfully wearisome