From Longman Dictionary of Contemporary Englishnanosecondnan‧o‧sec‧ond /ˈnænəʊˌsekənd $ -noʊ-/ noun [countable] TMa unit for measuring time. There are a billion nanoseconds in a second.
Examples from the Corpus
nanosecond• You should take some time off, even if your yearly salary is what Bill Gates earns in a nanosecond.• Here, at the unfriendly confines of Wrigley Field, was manager Bruce Bochy getting ejected in a nanosecond.• The half lives of these radicals are measured in nanoseconds - they literally destroy the first thing they bump in to.• These longer cycles may offer an antidote to the dis-ease created by the nanosecond culture.• Fuchs believes the time could be brought down to nanoseconds.From Longman Business Dictionarynanosecondnan‧o‧sec‧ond /ˈnænəʊˌsekənd-noʊ-/ noun [countable] COMPUTING one BILLIONTH of a second. Nanoseconds are used to talk about the speed at which computer CHIPs do calculationsThey will produce a bit of data in 30 nanoseconds. 