Definitions: (1) appropriate to the purpose or circumstance; suitable; (2) conforming to established standards of behavior or manners; correct or decorous; chaste; modest; (3) fitting; right; seemly; just; fair; (4) normal or regular; (5) fine; good; excellent; (6) becoming in appearance; handsome or comely

Saying: Time puts things in proper perspective.

• The only proper way to eliminate bad habits is to replace them with good ones. — Jerome A. Hines (1921–2003) American operatic bass singer
• When I look at the solar system, I see the earth at the right distance from the sun to receive the proper amounts of heat and light. This did not happen by chance. — Sir Isaac Newton (1642–1727) English polymath [six disciplines]