(informal) A classified advertisement in a newspaper or magazine.

to identify by or divide into classes; to categorize / to declare something a secret, especially a government secret / To make classy

(psychology) A learning process in which a previously neutral stimulus (such as a bell) is paired with a potent stimulus (such as food in the case of a dog), so that the neutral stimulus comes to elicit a conditioned response (salivation) similar to the one elicited by the potent stimulus.

(chemistry, geology) a classification of the chemical elements into groups according to the part of the Earth where they tend to concentrate.

(baseball) The World Series.

The Latin language as spoken and written in formal speeches, literature, the arts, etc., by the ancient Romans.

One who classes or classifies / (in combination) A member of a particular class

(physics) All of the physical laws of nature that account for the behaviour of the normal world, but break down when dealing with the very small (see quantum mechanics) or the very fast or very heavy (see relativity).

A competition held as part of a cycling stage race in which the riders are awarded points depending on how high they finish in each of the separate stages. The leader in the competition wears a special points jersey.

The overall standings in a bicycle stage race, based on a rider's total elapsed time in all stages of the race with the lowest time being the leader.