sound
US /saʊnd/
UK /saʊnd/

1.
音, 響き
vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear
:
•
The sound of music filled the room.
音楽の音が部屋に満ちた。
•
I heard a strange sound outside.
外で奇妙な音が聞こえた。
1.
2.
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1.
ぐっすり, 完全に
deeply or completely
:
•
She was sound asleep.
彼女はぐっすり眠っていた。
•
He was soundly defeated in the election.
彼は選挙で完全に敗北した。