onto
/ˈɑntu/
preposition
- To a position on the surface of something.
- She carefully placed the vase onto the shelf.
- The cat jumped onto the kitchen counter.
- Leaves fell from the tree onto the lawn.
- Used to indicate movement toward a location or state, often with a sense of arrival or contact.
- He stepped onto the stage and began his speech.
- The hikers climbed onto the ridge and saw the valley below.
- The boat drifted onto the shore after the storm.
- In mathematics, describing a function that maps every element of one set to at least one element of another set (surjective).
- The teacher explained that the mapping from students to their ID numbers is onto because every ID number is used.
- In the proof, they showed that the transformation is onto, covering all possible outputs.
- A function is called onto if every element in the codomain is the image of at least one element from the domain.
Synonyms
adjective
- In mathematics, describing a function that is surjective (every element of the codomain is mapped to by at least one element of the domain).
- The graph shows that the relation is not onto because some y-values have no corresponding x-values.
- To be onto, the function must cover the entire target set.
- An onto function is also called a surjection.
Synonyms
Antonyms