What is Await?

Legal Definition
In computer programming, await is a feature found in C# 5.0, Python 3.5, in an experimental extension for Scala, and more recently JavaScript that allows an asynchronous, non-blocking method call to be performed in a similar way to an ordinary synchronous method call.

While a casual reading of the code would suggest that the method call blocks until the requested data is available, in fact it does not.
-- Wikipedia
Legal Definition
Crim. law. Seems to signify what is now understood by lying in wait, or way-laying.
-- Bouviers Law Dictionary
Legal Definition
A term used in old statutes, signifying a lying in wait or waylaying.
-- Black's Law Dictionary
Legal Definition
To waylay.
-- Ballentine's Law Dictionary