Being a single entity, unit, object, or living being.
예문
1. one or two days (하루나 이틀, 짧은 일수) 2. such a one (그러한 사람) 3. one at a time (한번에 한 사람) 4. one dollar (1달러) 5. The one way to reach the island is by helicopter. (그 섬에 가는 유일한 방법은 헬리콥터이다)
[중2] 지학
1. One of the most important ways to save the earth is by saving electricity. [12과]
