arity /ˈæɹɪti/ noun3 •The number of arguments or operands a function or operation takes. For a relation, the number of domains in the corresponding Cartesian product. •the number of arguments (in Lojban grammar called sumti) specified in the definition of a selbri. (the selbri combined with the sumti make up a bridi). •The maximum number of child nodes that any node in a given tree (data structure) may have. formsarities
