the end of the world = the end of the age, age-time, or dispensation. The expression occurs six times (here, verses: Mat_13:40, Mat_13:49, Mat_13:3; Mat_28:20. Heb_9:26), always in this sense.
end. Greek. sunteleia (not "telos") = closing time, denoting the joining of two age-times: i.e. the closing time of one leading on to the other. The sunteleia mark the closing period, while telos marks the actual and final end.