onto

¹on·to

prep \ˈȯn-(ˌ)tü, ˈän-\

Definition of ONTO

1

: to a position on

2

: in or into a state of awareness about <put me onto your methods>

3

—used as a function word to indicate a set each element of which is the image of at least one element of another set <a function mapping the set S onto the set T>

Examples of ONTO

1. We climbed onto the building's roof.
2. The book fell onto the floor.
3. The water spilled onto the floor.
4. The cowboy leaped onto his horse.
5. Transfer the data onto a disk.
6. Turn left onto Third Street at the traffic light.

First Known Use of ONTO

1581