Definitions for onto-

This page provides all possible meanings and translations of the word onto-

Random House Webster's College Dictionary

on•toˈɒn tu, ˈɔn-; unstressed ˈɒn tə, ˈɔn-(prep.)

  1. to a place or position on; upon; on.

  2. Informal. aware of the true nature, motive, or meaning of:

    I'm onto your tricks.

    Category: Informal

  3. (adj.)Math. pertaining to a function or map from one set to another set, the range of which is the entire second set.

    Category: Math

Origin of onto:



  1. a combining form meaning “being”:


    Category: Affix

Origin of onto-:

< NL < Gk


  1. onto-(Prefix)


  2. Origin: from ὤν present participle of εἰμί


Find a translation for the onto- definition in other languages:

Select another language:

Discuss these onto- definitions with the community:


Use the citation below to add this definition to your bibliography:


"onto-." STANDS4 LLC, 2014. Web. 19 Dec. 2014. <>.

Are we missing a good definition for onto-?

The Web's Largest Resource for

Definitions & Translations

A Member Of The STANDS4 Network

Nearby & related entries:

Alternative searches for onto-: