2 used to describe the air at the top of a mountain, which contains less oxygen, making it harder to breathe --
3 not common and therefore sometimes valuable: --
With rare exceptions, the families in this town have lived here for generations.
She’s usually positive, but on rare occasions disappointment shows through.
Success like that is extremely rare.
4 (esp. of meat) not cooked for very long and still red inside: --
rare steak
Consider first the fact that faucal consonants are relatively rare in languages of the world.
In unilinguals, conceptual features may be transferred from a frequently used word to its rare quasi-synonym, possibly from a different sociolinguistic register.
In the four remaining polymorphisms, the rare allele is at most present in three sequences out of 20.
There are good teachers in higher education who organize such debates, but they are rare.
On the rare occasions where we present definitions out of sequence, we will explain what we are doing.
Rare observations of important events such as birth, predation, innovation, and teaching can be vitally important in directing research toward potentially important areas.
In the same way, high-rent streets were rarely of high density, and severe crowding (two or more persons per room) was rare among highrent households.
Rare species in communities of tropical insect herbivores: pondering the mystery of singletons.