fifteen /ˈfifˈti:n/ num.十五；十五岁：fifteen minutes of fame昙花一现的荣誉；片刻的风光The sum of seven and eight is fifteen. 七加八是十五。 She must be fifteen by now. 她如今肯定有15岁了。There were fifteen of us present.我们有十五个人出席。