noun
old promise; old agreement; old covenant
Refers to a promise or agreement made in the past, often with a somewhat formal or literary tone. Not an everyday word for 'promise'; 約束 is the common term.
旧約を破ることは許されない。
Breaking an old covenant is not permitted.
Abbreviation of 旧約聖書 (きゅうやくせいしょ). Commonly used in religious contexts or when discussing the Bible.
See also: 旧約聖書
旧約には創世記が含まれている。
The Old Testament includes the Book of Genesis.