Sergey Ivanovich Ozhegov (Russian: ?????´? ???´????? ?´?????; 22 September 1900 – 15 December 1964) was a Russian lexicographer who in 1926 graduated from the Leningrad University where his teachers included Lev Shcherba and Viktor Vinogradov.
In 1935–1940, Ozhegov contributed to Dmitry Ushakov's four-volume explanatory dictionary of the Russian language.
His main piece of work, the Dictionary of the Russian Language ("?????´?? ??´?????? ?????´"), as updated and corrected by Natalia Shvedova, is the most widely used reference for the Russian language today.
Ozhegov also ran the Russian Language Institute as part of the Russian Academy of Sciences to oversee and advise on the correct spelling, grammar and pronunciation of the Russian language.
Vladimir Nabokov, for instance, compared his dictionary with that of Vladimir Dahl unfavorably and, in his novel Ada or Ardor, even called it "moronic".