onto

See also: ónto, öntő, on to, onto-, and -onto

English

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

From on +‎ to, after into. Compare Saterland Frisian antou (“up to”).

onto

Upon; on top of.
- 2013 June 22, “Engineers of a different kind”, in 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.
My cat just jumped onto the keyboard.
(informal) Aware of.
The thought-police were onto my plans of world domination.
(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.

upon; on top of

Lithuanian: please add this translation if you can
Maltese: please add this translation if you can
Norwegian:
Norwegian Bokmål: please add this translation if you can

Norwegian Nynorsk: please add this translation if you can
Novial: a sur
Occitan: subre (oc), sus (oc), sobre (oc)
Polish: please add this translation if you can
Portuguese: sobre (pt), no (pt) m, na (pt) f
Russian: please add this translation if you can
Slovak: please add this translation if you can
Slovene: please add this translation if you can
Sorbian:
Lower Sorbian: na
Spanish: sobre (es)
Swahili: please add this translation if you can
Swedish: please add this translation if you can
Turkish: üstünde (tr), üstüne (tr)
Veps: please add this translation if you can
Volapük: please add this translation if you can
Votic: please add this translation if you can
Võro: please add this translation if you can
Welsh: ar (cy)

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.

surjective — see surjective

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