to say something in an official or public way
The judge will declare the winner of the competition.
審判員が競技の勝者を宣言します。
to state something clearly and firmly
She will declare her opinion during the meeting.
彼女は会議中に自分の意見を明確に表明します。
to say openly who you are or what you plan to do
He decided to declare his support for the new policy.
彼は新しい政策への支持を公に表明することに決めました。
to tell tax officials how much money you earned
You must declare all your income to the tax office.
税務署にすべての収入を申告しなければなりません。
to tell customs officers about goods you are bringing into a country
Travelers must declare any items that require duty payment.
旅行者は関税支払いが必要な物品を申告しなければなりません。
in cricket, to end your team's batting before all players have batted
The captain may declare to give the bowlers more time.
キャプテンはボウラーにより多くの時間を与えるために宣言するかもしれません。