Number n. mathematics . a member of the set of positive integers; one of a series of symbols of unique meaning in a fixed order that can be derived Translations of number. number synonyms number antonyms. information about number in the. no. ordinal ordinal number the number designating place in an ordered sequence. A number is a mathematical object used in counting and measuring.. unary operations take a single input number and produce a single output number.. Number definition at dictionary.com a free online dictionary with pronunciation synonyms and translation. look it up now! No definition at dictionary.com a free online dictionary with pronunciation synonyms and translation. look it up now! F-number n. the ratio of the focal length of a lens or lens system to the effective diameter of its aperture. in contrast us number starts with 1 equalling f/4 and proceeds. Adjectives and nouns should agree in gender number and case.. he had to focus on the mission staying alive and getting out not on the sexy number rubbing up against him.. No!no! products offer professional technology for hair removal and acne clearance. remove hair and get rid of pimples at home. Information about no in the free online english dictionary and encyclopedia. no more. atomic number 102 nobelium. chemical element element any of the more than 100 known. No symbol a circle with a diagonal line through it. normally open a type of electrical. numero sign (no. or ?) an abbreviation of the word number.