onto Meaning & Definition
What Does Onto Mean?
Onto is used as a preposition meaning Arriving upon or on top of (speaking of a physical or metaphorical movement). It is also used to mean Aware of. As an adjective, it means Attaining each of the values in its codomain; having its image equal to its codomain. As an adjective, it means (of a function) Assuming each of the values in its codomain; having its range equal to its codomain.
Onto: Key Facts
| Part of speech | preposition, adjective |
|---|---|
| Pronunciation | /ˈɒn.tuː/ |
| Syllables | 2 |
| Synonyms | surjective |
Onto Definition (Preposition)
- Arriving upon or on top of (speaking of a physical or metaphorical movement).
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.
Onto as an Adjective
- Attaining each of the values in its codomain; having its image equal to its codomain.
Considered as a function on the real numbers, the exponential function is not onto, as it never takes on values less than or equal to zero.
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.
Synonyms of Onto
Onto synonyms and antonyms →Onto in a Sentence
My cat just jumped onto the keyboard.
A new drug has just come onto the market.
The thought-police were onto my plans of world domination.
The exponential function maps the set of real numbers onto the set of positive real numbers.
Considered as a function on the real numbers, the exponential function is not onto, as it never takes on values less than or equal to zero.
Considered as a function on the real numbers, the exponential function is not onto.
Word Forms & Grammar
onto
onto (not comparable)
Words That Rhyme With Onto
Origin of Onto
From on + to, after into. Compare Saterland Frisian antou (“up to”).
Pronouncing Onto
The standard pronunciation of onto is /ˈɒn.tuː/, spoken in 2 syllables, with the main stress on the first syllable (ɒn).