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lock on (to) (someone or something)
1. To become able to automatically track and target someone or something. We've locked on the enemy ship, sir. Permission to fire? The fighter jet had locked on to us, so there was no option except to eject.
2. To fix one's gaze onto someone or something; to stare at someone or something with intensity. He locked on to a wealthy businessman on the other side of the bar who looked like the perfect target for his scam.
3. To fasten, attach, or grab onto someone or something, especially with great speed or intensity. He locked on to the suitcase and refused to let go. My son locked on to my leg when the man came up to talk to us.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
lock on (to someone or something)
to fasten or grab onto someone or something. She locked onto the child and wouldn't leave his side for an instant. I saw the thing 1wanted and locked on.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
1. To aim something at a moving target so as to follow it automatically: The pilot locked the heat-seeking missile on its target.
2. To stare at someone or something intently; fix one's gaze on someone or something: The detective's eyes locked on the suspicious package under the desk.
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.