Definition
to call on someone you haven't met in a while when you are in their area
到某地時，去拜訪或探望長久未見的朋友
I plan to look my old friend up when I visit New York next time.
我計劃下次去紐約時拜訪我的老朋友。
She always looks up her old classmates when she travels.
她每次旅行時都會去拜訪她的老同學。
He made a point to look up his middle school teacher when he was back in his hometown.
他回到家鄉時特意去拜訪了他的中學老師。