A gesture or sound made to communicate information or instructions.
The coach gave a signal for the team to start the play.
コーチはチームにプレーを開始する信号を出した。
A device using lights to control traffic, especially on roads and railways.
The train came to a halt due to a signal failure.
信号障害のために列車が停止しました。
An electromagnetic wave that conveys sounds, images, or messages to a receiver.
The radio picked up a weak signal from the distant station.
ラジオは遠くの局からの弱い信号を拾った。
An indication or hint that suggests the existence or likelihood of something.
The smoke was a signal that there was a fire nearby.
煙は近くに火事があるという信号でした。
To communicate information or instructions using a gesture or sound.
The guard signaled to us that the gate was open.
ガードが私たちにゲートが開いていることを合図しました。
To indicate a change in direction of a vehicle by using lights or hand signals.
You must signal before you change lanes on the highway.
高速道路で車線を変える前に合図が必要です。
To be a sign or indication of something.
The decline in sales signals a problem with the product.
売上高の減少は製品の問題を示しています。
To express one's feelings or intentions in a subtle way.
She signaled her approval by nodding her head.
彼女は頷きで同意を示しました。
Having a significant meaning or impact.
The election results were a signal victory for the party.
選挙結果は当党にとって明白な勝利でした。