Definitions from Wiktionary (Waker)

▸ adjective:  (now chiefly UK dialectal) Watchful; vigilant; alert.
▸ noun:  One who wakens or arouses from sleep.
▸ noun:  One who wakes somebody or something.
▸ noun:  (programming) In the Rust programming language, a handle that "wakes up" a task by notifying its executor that it is ready to be run.
▸ noun:  A surname transferred from the nickname.

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