Being a single entity, unit, object, or living being.
예문
1. in one direction (같은 방향으로) 2. at one and thirty (31세 때에) 3. one or two (한 두 개) 4. One must obey one's parents. (사람은 부모의 말에 따라야 한다) 5. To know a language is one thing, to teach it is another. (한 언어를 알고 있다는 것과 그것을 가르치는 일은 별개의 문제이다)
[중2] 지학
1. One of the most important ways to save the earth is by saving electricity. [12과]
