Onto

/ˈɒn.tuː/

Last Updated: January 2, 2026 at 12:30 PM

Scrabble:4 ptsWWF:5 pts4 letters

Definition of Onto

adjective

(of a function) Assuming each of the values in its codomain; having its range equal to its codomain.
"Considered as a function on the real numbers, the exponential function is not onto."

preposition

Upon; on top of.
"My cat just jumped onto the keyboard."
Aware of.
"The thought-police were onto my plans of world domination."
Being an onto function with a codomain of (see below).
"The exponential function maps the set of real numbers onto the set of positive real numbers."

Anagrams of Onto

Exact Anagrams

1 word using all 4 letters:

Words You Can Make

7 words can be made from the letters in "onto":

4-LETTER WORDS

3-LETTER WORDS

noo not ono oot ton too

+1 Letter Anagrams

Words formed by adding one letter to "onto" and rearranging:

Related Word Patterns

ON...Words starting with "on"...TOWords ending with "to"All 4-letter words Unscramble "onto"

Synonyms & Antonyms

SYNONYMS

surjective

Rhyming Words

aggiornamento agitato allegretto alto amaretto amoretto anatto animato annatto antimosquito antipasto aristo arnatto arnotto auto+5 more

Related Words

oafs oaks oaky oars oast oath oats obas obes obey obia obis obit oboe obol