The decade of the 1930s. / Temperatures from 30 to 39 degrees. / Ages from 30 to 39. / The numbers from 30 to 39.

Alternative spelling of 30s

(telecommunications) end of message.

(Canada, US, journalism) Indicates the end of a story, article, or press release that is submitted for editing and typesetting.

(physics) A minor stable isotope of silicon, ³⁰₁₄Si, having fourteen protons and sixteen neutrons; it amounts to 3% of the element in nature

Alternative form of 30s

(cellular automata) A one-dimensional binary cellular automaton rule displaying aperiodic, chaotic behaviour.

(informal) 30 Rockefeller Plaza, a skyscraper in Midtown Manhattan, New York City, United States.

(often with "the") North Central Colorado, including Denver and Boulder, after the 303 area code.

(singular only, informal, firearms) The .303 British rifle calibre. / (countable) A rifle chambered in this calibre, normally the SMLE series. / (countable, music) The TB-303 synthesizer.