kənˈstɹeɪn ˈfɑːsən ˈfæsən ɹɪˈdjuːs ɹɪˈduːs ˈstɪfən ˈtaɪ.tən narrow or limit reduce the influx of foreigners severely restrict in scope or extent tighten the rules stiffen the regulations become tight or tighter The rope tightened make tight or tighter Tighten the wire