occupying a position between the upper class and the working class

A social and economic class lying above the working class and below the upper class.

The state or measure of being clear, either in appearance, thought or style; lucidity. / The ability to be easily understood.

(set theory) Any one of the subsets into which an equivalence relation partitions a set, each of these subsets containing all the elements of the set that are equivalent under the equivalence relation.

(law, chiefly US, Canada) A lawsuit brought by a single plaintiff or small group of plaintiffs as a representative of a large group of others having a common interest, with everyone in the large group eligible to receive damages if the plaintiff is successful.

(intransitive, slang) To become silent; to stop talking, to shut up. / (transitive, intransitive) To make or become clammy.

of high social position / aristocratic

those people at the top of a social hierarchy / the aristocracy

(idiomatic) That for which one has bragging rights; one's reason for being well-known or famous.

simple past tense and past participle of clap