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onto

[on-too, awn-; unstressed on-tuh, awn-] /ˈɒn tu, ˈɔn-; unstressed ˈɒn tə, ˈɔn-/
preposition
1.
to a place or position on; upon; on:
to get onto a horse.
2.
Informal. in or into a state of awareness about:
I'm onto your scheme.
adjective
3.
Also, surjective. Mathematics. pertaining to a function or map from one set to another set, the range of which is the entire second set.
Origin
1575-1585
1575-85; on + to
Can be confused
on, onto, on to.

onto-

1.
a combining form meaning “being,” used in the formation of compound words:
ontogeny.
Also, especially before a vowel, ont-.
Origin
< Neo-Latin < Greek ont- (stem of ón, neuter present participle of eînai to be) + -o- -o-
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for onto
  • Slide a whole salmon fillet onto the grill, along with vegetable skewers.
  • And perhaps now another box can be checked: the practice of bribing one's way onto the charts.
  • Early whales plied the shallows but still hauled themselves onto shore, probably to rest and to give birth.
  • Yahoo isn't happy that a detailed menu of the spying services it provides law enforcement agencies has leaked onto the web.
  • Often something pops up in the conclusion that you can latch onto.
  • Moving out of the laboratory and onto the water, with a working oil-collection system, is the next step.
  • So they are going to slide the locomotive onto the back of the flatbed while it's still indoors.
  • Blot any juice from the cut end, then tap it onto your ink pad to cover the star's entire surface.
  • Print out the carousel card onto a card-weight paper stock.
  • These vibrations shake the pollen off the flower's anthers and onto the bee's body.
British Dictionary definitions for onto

onto

/ˈɒntʊ; unstressed ˈɒntə/
preposition
1.
to a position that is on: step onto the train as it passes
2.
having become aware of (something illicit or secret): the police are onto us
3.
into contact with: get onto the factory
Usage note
Onto is now generally accepted as a word in its own right. On to is still used, however, where on is considered to be part of the verb: he moved on to a different town as contrasted with he jumped onto the stage

onto-

combining form
1.
existence or being: ontogeny, ontology
Word Origin
from Late Greek, from ōn (stem ont-) being, present participle of einai to be
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for onto
prep.

1580s, as on to, from on + to. Appeared much later than parallel into. As a closed compound (on analogy of into), first recorded 1715.

onto-

word-forming element meaning "a being, individual; being, existence," from Greek onto-, from stem of on (genitive ontos) "being," neuter present participle of einai "to be" (see essence).

Online Etymology Dictionary, © 2010 Douglas Harper
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onto in Medicine

onto- or ont-
pref.
Organism; being: ontogeny.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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onto in Technology
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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4
5
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