RARE, adjective [Latin rarus, thin.] 1. Uncommon; not frequent; as a rare event; a rare phenomenon. 2. Unusually excellent; valuable to a degree seldom found. RARE work, all fill'd with terror and delight. Above the rest I judge one beauty rare 3. Thinly scattered. 4. Thin; porous; not dense; as a rare and attenuate substance. Water is nineteen times lighter and by consequence nineteen times rarer than gold. 5. Nearly raw; imperfectly roasted or boiled; as rare beef or mutton; eggs roasted rare
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI