1An adverb used to ask about manner, state, or degree — 'how', 'in what way' — and also to make a suggestion or ask for an opinion, as in 'how about'.
この料理、どう？おいしい？
How's this dish? Is it tasty?
明日の予定はどうする？映画に行く？
What shall we do about tomorrow's plan? Go to a movie?
パソコンの調子が悪いんだけど、どう直せばいいか分からない。
My computer is acting up, and I don't know how to fix it.
コーヒーもう一杯、どうですか？
How about another cup of coffee?