one meaning; single sense
Formal use for a single meaning or definition of a word, phrase, or concept. In everyday language, 一つの意味 is usually more transparent.
Technical terms need to be given as clear a single meaning as possible.
primary importance; primary significance; primary consideration
Stiff written-style noun meaning the chief significance, purpose, or consideration of something; close in feel to 第一義.
The primary purpose of this system is to protect users' safety.
a reason; a truth; a principle
Rare abstract use of 義 as 'reason,' 'principle,' or 'truth.' It is mainly encountered in formal, scholarly, or older-style discussion rather than ordinary conversation.
In old commentaries, 一義 is sometimes used to mean a single principle or truth.
This company treats safety as its top priority.