capable of having a sum assigned to it by a method other than the usual one of taking the limit of successive partial sums
3. (of a function)
possessing a finite Lebesgue integral
Derived forms
summability
noun
Word origin
[1775–85; sum + -able]This word is first recorded in the period 1775–85. Other words that entered Englishat around the same time include: alto, cabriole, flashing, pinafore, waltz-able is a suffix meaning “capable of, susceptible of, fit for, tending to, given to,”associated in meaning with the word able, occurring in loanwords from Latin (laudable); used in English as a highly productive suffix to form adjectives by addition tostems of any origin (teachable; photographable)