be on to

English

Pronunciation

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Verb

be on to (third-person singular simple present is on to, present participle being on to, simple past was on to, past participle been on to)

1. (idiomatic) To figure out; to realize the truth.

   I was planning it as a surprise, but I think he is on to me.

See also

• catch on to
• cotton on to

Anagrams

• botoné, obento