1700s noun[plural only]2 •The period from year 1700 to 1799, almost the same period as the 18th century (which, however, was from 1701 to 1800).When Nakanishi became the headmaster of his own ryu, in the later 1700s, he began looking for a way to make swordsmanship less hazardous, concentrating on the improvement of practice equipment. — 1982 •The years 1700 to 1709, almost the same period as the 1st decade of the 18th century (which, however, was from 1701 to 1710).