Definition/Meaning of onto

• English - Preposition: onto Upon; on top of . 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 . Translations
• English - Adjective: 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 . Synonyms ( mathematics ) : surjective See also ( mathematics ) : one-to-one, injective , bijective Translations
• English - Alternative forms: on to ( UK , Ireland and Commonwealth countries including Canada , Australia , New Zealand , South Africa etc )
• English - Anagrams: noot , toon , Toon