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onside kick
Ontario, Lake
ontological argument

onto definitions

Merriam Webster's

I. preposition Date: 1581 1. to a position on 2. in or into a state of awareness about <put me onto your methods> 3. used as a function word to indicate a set each element of which is the image of at least one element of another set <a function mapping the set S onto the set T> II. adjective Date: 1942 mapping elements in such a way that every element in one set is the image of at least one element in another set <a function that is one-to-one and onto>

Oxford Reference Dictionary

prep. disp. to a position or state on or in contact with (cf. on to). Usage: The form onto is still not fully accepted in the way that into is, although it is in wide use. It is however useful in distinguishing sense as between we drove on to the beach (i.e. in that direction) and we drove onto the beach (i.e. in contact with it).

Webster's 1913 Dictionary

Onto On"to, prep. [On + to. Cf. Into.] On the top of; upon; on. See On to, under On, prep.

Collin's Cobuild Dictionary

also on to Frequency: The word is one of the 3000 most common words in English. Note: In addition to the uses shown below, 'onto' is used in phrasal verbs such as 'hold onto' and 'latch onto'. 1. If something moves or is put onto an object or surface, it is then on that object or surface. I took my bags inside, lowered myself onto the bed and switched on the TV... Smear Vaseline on to your baby's skin to prevent soreness. PREP 2. You can sometimes use onto to mention the place or area that someone moves into. The players emerged onto the field... Alex turned his car on to the Albert Quay and drove along until he found a parking place. PREP 3. You can use onto to introduce the place towards which a light or someone's look is directed. ...the metal part of the door onto which the sun had been shining... ...the house with its leafy garden and its view on to Regent's Park. PREP 4. 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. ...windows opening onto carved black-wood balconies... The door opened onto a lighted hallway. PREP: v PREP n 5. When you change the position of your body, you use onto to introduce the part your body which is now supporting you. As he stepped backwards she fell onto her knees, then onto her face... I willed my eyes to open and heaved myself over on to my back. PREP 6. When you get onto a bus, train, or plane, you enter it in order to travel somewhere. As he got on to the plane, he asked me how I was feeling... 'I'll see you onto the train.''Thank you.' ? off PREP 7. 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. The reflector is held onto the sides of the spacecraft with a frame... She was conscious of a second man hanging on to the rail... PREP 8. If people who are talking get onto a different subject, they begin talking about it. Let's get on to more important matters... So, if we could just move onto something else? PREP 9. You can sometimes use onto to indicate that something or someone becomes included as a part of a list or system. The Macedonian question had failed to get on to the agenda... The pill itself has changed a lot since it first came onto the market... Twelve thousand workers will go onto a four-day week at their factory in Birmingham. PREP 10. If someone is onto something, they are about to discover something important. (INFORMAL) He leaned across the table and whispered to me, 'I'm really onto something.'... Archaeologists knew they were onto something big when they started digging. PREP: be PREP n 11. If someone is onto you, they have discovered that you are doing something illegal or wrong. (INFORMAL) I had told people what he had been doing, so now the police were onto him. PREP: be PREP n


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