Rare; uncommon or unusual. Often used for collectibles, items, or events that are scarce.
このカードはとてもレアで、なかなか手に入らない。
This card is very rare and hard to obtain.
レアなアイテムが出るまで何時間もゲームを続けた。
I kept playing for hours until a rare item appeared.
その現象はレアだが、過去に報告がある。
That phenomenon is rare, but there have been past reports.
Rare (in cooking): lightly cooked, with the inside still quite red/uncooked; commonly used when ordering steak.
ステーキはレアでお願いします。
I'd like the steak rare, please.
彼はいつもレアよりミディアムが好きだと言う。
He always says he prefers medium rather than rare.
レアで提供される魚料理は新鮮さが重要だ。
For fish served rare, freshness is important.