key
noun
a small metal instrument specially cut to fit into a lock and move its bolt.
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Defenses have been keying heavily on Gurley this season, and the Bills did a remarkable job in bottling up Patriots running back LeGarrette Blount last week.
From Washington Times ● Oct. 7, 2016