signal

US /ˈsɪɡ.nəl/
UK /ˈsɪɡ.nəl/
"signal" picture
1.

sinal, indicação

a gesture, action, or sound that conveys information or an instruction

:
He gave a signal to the driver to stop.
Ele deu um sinal para o motorista parar.
The traffic light changed to a green signal.
O semáforo mudou para um sinal verde.
2.

sinal, onda

an electrical impulse or radio wave transmitted or received

:
The phone has a weak signal here.
O telefone tem um sinal fraco aqui.
The radio signal was clear.
O sinal de rádio estava claro.
1.

sinalizar, indicar

to make a gesture or sound to convey information or an instruction

:
He signaled for the waiter to bring the bill.
Ele sinalizou para o garçom trazer a conta.
The referee signaled the end of the game.
O árbitro sinalizou o fim do jogo.