1.
favorite, preferred thing
Something one likes especially well, such as a favorite item, place, or brand.
2.
favorite person, pet, darling
A person who is especially liked or favored by someone, such as a teacher's pet or a boss's favorite employee.
Literally '気に入る' (to take a liking to) with the polite prefix お. Often used as a modifier: お気に入りの + noun.
Common patterns
- お気に入りの〜: one's favorite ~
- お気に入りに登録する: to bookmark/add to favorites (web/apps)
- お気に入りに入れる: to add to favorites
Nuance: In sense 2, calling someone お気に入り can imply favoritism and may carry a slightly negative connotation, suggesting unfair preferential treatment.