1The interchange and mutual interaction of people, cultures, or ideas — as in international exchange or interaction between students.
姉妹都市との文化交流イベントに参加した。
I took part in a cultural exchange event with our sister city.
留学生と日本人学生の交流を深めるための企画が行われた。
An event was held to deepen interaction between international students and Japanese students.
SNSを通じて、世界中の人と気軽に交流できる時代になった。
It's become an age where you can easily interact with people all over the world through social media.
会社間の技術交流によって、新しい製品が生まれた。
A new product was born out of technical exchange between the companies.
2In electrical engineering, current that periodically reverses direction; short for 交流電流, i.e. alternating current (AC), as used in household power supplies.
家庭のコンセントからは交流の電気が供給されている。
Household outlets supply alternating current.
このアダプターは交流を直流に変換する装置だ。
This adapter is a device that converts AC to DC.