Translation of "decline" - English-Japanese dictionary

decline

verb uk /dɪˈklaɪn/ (present participle declining, past tense and past participle declined)

to become less in amount, importance, quality, or strength

~が減少する
Sales of CDs have declined steadily.

formal If you decline something, you refuse it politely.

(申し出などを)ていねいに断る
I invited him to the meeting but he declined.

(Translation of “decline verb” from the Cambridge English–Japanese Dictionary © Cambridge University Press)