Webster's Revised Unabridged Dictionary · 1913

Class

Class (klȧs) , noun

[French classe, from Latin classis class, collection, fleet; akin to Greek klh^sis a calling, kalei^n to call, English claim, haul.]

1.
A group of individuals ranked together as possessing common characteristics; as, the different classes of society; the educated class; the lower classes.
2.
A number of students in a school or college, of the same standing, or pursuing the same studies.
3.
A comprehensive division of animate or inanimate objects, grouped together on account of their common characteristics, in any classification in natural science, and subdivided into orders, families, tribes, genera, etc.
4.
A set; a kind or description, species or variety.
She had lost one class energies. — Macaulay
5.
(Methodist Church) One of the sections into which a church or congregation is divided, and which is under the supervision of a class leader.
6.
One session of formal instruction in which one or more teachers instruct a group on some subject. The class may be one of a course of classes, or a single special session.
7.
A high degree of elegance, in dress or behavior; the quality of bearing oneself with dignity, grace, and social adeptness.
Collocations (2)
Class of a curve (Mathematics) , the kind of a curve as expressed by the number of tangents that can be drawn from any point to the curve. A circle is of the second class.
Class meeting (Methodist Church) , a meeting of a class under the charge of a class leader, for counsel and relegious instruction.

Class (klȧs) , transitive verb

[Compare French classer. See Class, n.]

1.
To arrange in classes; to classify or refer to some class; as, to class words or passages.

In scientific arrangement, to classify is used instead of to class.

2.
To divide into classes, as students; to form into, or place in, a class or classes.

Class , intransitive verb

To be grouped or classed.
The genus or family under which it classes. — Tatham

Class (klȧs) , adjective

exhibiting refinement and high character; as, a class act. Opposite of low-class [informal]