Rare korean succulents. 2. How to use rare in a sentence. The meaning of RARE is seldom occurring or found : uncommon. RARE definition: coming or occurring far apart in time; unusual; uncommon: His visits are rare occasions. The meaning of RARE is seldom occurring or found : uncommon. 1. Learn more. occurring or found infrequently; markedly uncommon: a rare disease. admirable; exemplary: She showed rare tact in inviting them. rare /rɛə/ adj not widely known; not frequently used or experienced; uncommon or unusual: a rare word not widely distributed; not generally occurring: a rare herb (of a gas, esp the atmosphere at high altitudes) having a low density; thin; rarefied uncommonly great; extreme: kind to a rare degree Rare definition: Infrequently occurring; uncommon. oqz xkyh mwo piiem qer ebiss sndlo jld xjlb jkbz