Definition of onto preposition from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈɒntə//
    ; NAmE NAmE//ˈɑːn//
    , NAmE//ˈɔːn//
    ; BrE before vowels BrE//ˈɒntu//
    ; NAmE NAmE//ˈɑːntu//
    , NAmE//ˈɔːntu//
    (also on to)
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  1. 1  used with verbs to express movement on or to a particular place or position Move the books onto the second shelf. She stepped down from the train onto the platform.
  2. 2  used to show that something faces in a particular direction The window looked out onto the terrace.
  3. Phrasal Verbsbe onto somebodybe onto something
See the Oxford Advanced American Dictionary entry: onto