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ALL meanings of onto

on·to
O o
  • abbreviation Technical meaning of ONTO surjection 3
  • preposition onto on top of 1
  • preposition onto aware: of sb's plans, etc. 1
  • noun onto Moving to a location on (the surface of something). 1
  • noun Technical meaning of onto (mathematics)   A function f : A -> B is surjective or onto or a surjection if f A = B. I.e. f can return any value in B. This means that its image is its codomain. Only surjections have right inverses, f' : B -> A where f (f' x) = x since if f were not a surjection there would be elements of B for which f' was not defined. See also bijection, injection. 1
  • preposition onto to a place or position on; upon; on: to get onto a horse. 1
  • preposition onto Informal. in or into a state of awareness about: I'm onto your scheme. 1
  • adjective onto Also, surjective. Mathematics. pertaining to a function or map from one set to another set, the range of which is the entire second set. 1
  • preposition onto If someone is onto something, they are about to discover something important. 0
  • preposition onto If someone is onto you, they have discovered that you are doing something illegal or wrong. 0
  • preposition onto to a position that is on 0
  • preposition onto having become aware of (something illicit or secret) 0
  • preposition onto into contact with 0
  • preposition onto to and upon; to a position on 0
  • preposition onto aware of or familiar with, esp. aware of the real nature or meaning of 0
  • preposition onto If something moves or is put onto an object or surface, it is then on that object or surface. 0
  • preposition onto You can sometimes use onto to mention the place or area that someone moves into. 0
  • preposition onto You can use onto to introduce the place towards which a light or someone's look is directed. 0
  • preposition onto You can use onto to introduce a place that you would immediately come to after leaving another place that you have just mentioned, because they are next to each other. 0
  • preposition onto When you change the position of your body, you use onto to introduce the part your body which is now supporting you. 0
  • preposition onto When you get onto a bus, train, or plane, you enter it in order to travel somewhere. 0
  • preposition onto Onto is used after verbs such as 'hold', 'hang', and 'cling' to indicate what someone is holding firmly or where something is being held firmly. 0
  • preposition onto If people who are talking get onto a different subject, they begin talking about it. 0
  • preposition onto You can sometimes use onto to indicate that something or someone becomes included as a part of a list or system. 0
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