Meaning of PENDULUM in English

PENDULUM

pen ‧ du ‧ lum /ˈpendjələm, ˈpendjʊləm $ -dʒə-/ BrE AmE noun [countable]

[ Date: 1600-1700 ; Language: Modern Latin ; Origin: Latin pendulus ; ⇨ ↑ pendulous ]

1 . a long metal stick with a weight at the bottom that swings regularly from side to side to control the working of a clock

2 . the pendulum used to talk about the tendency of ideas, beliefs etc to change regularly to the opposite:

After several years of Republican government, the pendulum will undoubtedly swing back and voters will elect a Democrat.

the pendulum of

the pendulum of fashion

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.