What is the meaning of tedious?

adjective

• So lacking in interest as to cause mental weariness.
  • usage: "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- Edmund Burke; "tedious days on the train"; "the tiresome chirping of a cricket- Mark Twain; "other people's dreams are dreadfully wearisome"
  • synonyms: boring, deadening, dull, ho-hum, irksome, slow, tiresome, wearisome
• Using or containing too many words.
  • usage: "long-winded (or windy) speakers"; "verbose and ineffective instructional methods"; "newspapers of the day printed long wordy editorials"; "proceedings were delayed by wordy disputes"
  • synonyms: long-winded, verbose, windy, wordy