noun
standard; criterion; rule; norm
Refers to a guiding principle, benchmark, or established rule by which things are measured or judged. Often used in formal, philosophical, or technical contexts.
この業界では、安全が最優先の規矩とされている。
In this industry, safety is regarded as the foremost standard.
彼の行動は社会の規矩から外れている。
His behavior deviates from the norms of society.
noun
compass and ruler
Literal meaning: the tools used for drawing circles and straight lines. This sense is rare in modern usage and mainly appears in historical or technical descriptions of craftsmanship.
昔の大工は規矩を使って正確な図面を引いた。
Carpenters of old used compass and ruler to draw precise plans.