be onto (one)

(redirected from they're on to her)

be onto (one)

1. To have knowledge, be suspicious, or be aware of one's actions, behavior, or intention. You'd better tread carefully—I'm onto you now. The police are onto us! Everybody run!
2. To be in contact with one at a given point in time. I'll be onto you tomorrow about the details of our meeting. I was onto John yesterday about where he wants to go for his birthday.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

be on to

1. Be aware of or have information about, as in They can't pull that trick again; we're on to them now. [Colloquial; second half of 1800s]
2. Discover something important or profitable, as in The researchers claim they are really on to something big. [Colloquial; mid-1900s]
See also: on, to
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

be on to someone

be close to discovering the truth about an illegal or undesirable activity that someone is engaging in. informal
See also: on, someone, to
Farlex Partner Idioms Dictionary © Farlex 2017

be ˈonto somebody


1 (informal) know about what somebody has done wrong: She knew the police would be onto them.
2 (also get ˈonto somebody) be talking to somebody, usually in order to ask or tell them something: They’ve been onto me for ages to get a job.I must get onto the local council about all the rubbish in the street.
See also: somebody
Farlex Partner Idioms Dictionary © Farlex 2017

be onto

v.
To be in the process of finding or understanding something: I'm not sure, but I may be onto a solution to this math problem. The gang was afraid that the police were onto them.
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.

be on to

Informal
To be aware of or have information about: You'll never deceive us again; we're on to you.
See also: on, to
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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