Definitions from Wiktionary (surjection)
▸ noun: (set theory) A function for which every element of the codomain is mapped to by some element of the domain; (formally) Any function f:X→Y for which for every y∈Y, there is at least one x∈X such that f(x)=y.
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▸ noun: (set theory) A function for which every element of the codomain is mapped to by some element of the domain; (formally) Any function f:X→Y for which for every y∈Y, there is at least one x∈X such that f(x)=y.
Similar:
surjective function,
surjectivity,
onto function,
injection,
suspension,
subduction,
bijection,
superset,
surjunctive group,
inclusion,
more...
Opposite:
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▸ Invented words related to surjection