## EnglishEdit

### Alternative formsEdit

- on to (UK, Ireland and Commonwealth countries including Canada, Australia, New Zealand, South Africa etc)

### PrepositionEdit

**onto**

- Upon; on top of.
**2013**June 22, “Engineers of a different kind”, The Economist, volume 407, number 8841, page 70:- Private-equity nabobs bristle at being dubbed mere financiers. Piling debt
**onto**companies’ balance-sheets is only a small part of what leveraged buy-outs are about, they insist. Improving the workings of the businesses they take over is just as core to their calling, if not more so. Much of their pleading is public-relations bluster.

- Private-equity nabobs bristle at being dubbed mere financiers. Piling debt

*My cat just jumped***onto**the keyboard.

- (informal) Aware of.
- (The thought-police were
**onto**my plans of World domination.)

- (The thought-police were
- (mathematics) 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.

#### TranslationsEdit

upon; on top of

### AdjectiveEdit

**onto** (*not comparable*)

- (mathematics, 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**.

#### SynonymsEdit

- (mathematics): surjective

#### See alsoEdit

- (mathematics): one-to-one, injective, bijective

#### TranslationsEdit

surjective —

*see*surjective