1Quite, very — an adverb intensifying degree, close in meaning to とても or 非常に but with a more measured, understated tone. Often appears in set phrases like ごく普通 (quite ordinary) and ごく一部 (just a small part).
これはごく一般的な例だ。
This is a perfectly ordinary example.
反対しているのは、ごく一部の人だけだ。
Only a very small number of people are opposed.
ごく普通の学校生活を送っている。
I'm living a perfectly ordinary school life.
その情報はごく限られた人しか知らなかった。
Only a very limited number of people knew that information.
2A classical Sino-Japanese numeral (written 極) denoting 10^48 (a quindecillion) in the traditional large-number naming system. Essentially unused in everyday modern speech or writing; it appears only in reference material listing the traditional Japanese number names.