nanosecondPronunciation: /ˈnanə(ʊ)sɛkənd/ (abbreviation: ns)Translate nanosecond | into Italian Definition of nanosecond noun one thousand-millionth of a second. informal a very short time; a moment:she can flick between manic laughter and tears in a nanosecondnanosecond in other Oxford dictionaries Definition of nanosecond in the US English dictionary
