noun
next century
Refers to the century following the current one. Often used in speculative or futuristic contexts.
来世紀には、宇宙旅行が一般的になるかもしれない。
In the next century, space travel may become commonplace.
来月 means 'next month', while 来世紀 refers to the next century.
Compound of 来 (rai, 'next') and 世紀 (seiki, 'century').