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onto

 - 5 dictionary results

on⋅to

  [on-too, awn-; unstressed on-tuh, awn-]
Use onto in a Sentence
–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:
1575–85; on + to

onto-

 
a combining form meaning “being,” used in the formation of compound words: ontogeny.
Also, especially before a vowel, ont-.

Origin:
< NL < Gk ont- (s. of ón, neut. prp. of eînai to be) + -o- -o-
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To onto
on·to   (ŏn'tōō', -tə, ôn'-)   
prep.  

  1. On top of; to a position on; upon: The dog jumped onto the chair. See Usage Note at on.

  2. Informal Fully aware of; informed about: The police are onto the robbers' plans.

adj.   Mathematics
Of, relating to, or being a mapping such that every element of the target set referred to is the image of an element in the domain.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

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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Computing Dictionary

onto
surjection

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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