Definition
To search thoroughly in every possible place.
四處尋找
I hunted high and low for my keys, turning the whole place upside down.
我到處找我的鑰匙，把整個地方翻了個底朝天。
They searched high and low to find the missing cat.
他們到處尋找那隻失蹤的貓。
She searched high and low in nearly every bookstore to find that out-of-print book.
她幾乎找遍了每家書店，就為了找到那本絕版的書。