The Collaborative International Dictionary of English v.0.48:

Class \Class\ (kl[.a]s), v. t. [imp. & p. p. Classed
   (kl[.a]st); p. pr. & vb. n. Classing.] [Cf. F. classer. See
   Class, n.]
   1. To arrange in classes; to classify or refer to some class;
      as, to class words or passages.
      [1913 Webster]

   Note: In scientific arrangement, to classify is used instead
         of to class. --Dana.
         [1913 Webster]

   2. To divide into classes, as students; to form into, or
      place in, a class or classes.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Class \Class\ (kl[.a]s), n. [F. classe, fr. L. classis class,
   collection, fleet; akin to Gr. klh^sis a calling, kalei^n to
   call, E. 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.
      [1913 Webster]

   2. A number of students in a school or college, of the same
      standing, or pursuing the same studies.
      [1913 Webster]

   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.
      [1913 Webster]

   4. A set; a kind or description, species or variety.
      [1913 Webster]

            She had lost one class energies.      --Macaulay.
      [1913 Webster]

   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.
      [1913 Webster]

   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.
      [PJC]

   7. A high degree of elegance, in dress or behavior; the
      quality of bearing oneself with dignity, grace, and social
      adeptness.
      [PJC]

   Class of a curve (Math.), 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.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Class \Class\, v. i.
   To be grouped or classed.
   [1913 Webster]

         The genus or family under which it classes. --Tatham.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Class \Class\ (kl[.a]s), a.
   exhibiting refinement and high character; as, a class act.
   Opposite of low-class [informal]

   Syn: high-class. [PJC]

WordNet (r) 3.0 (2006):

class
    n 1: a collection of things sharing a common attribute; "there
         are two classes of detergents" [syn: class, category,
         family]
    2: a body of students who are taught together; "early morning
       classes are always sleepy" [syn: class, form, grade,
       course]
    3: people having the same social, economic, or educational
       status; "the working class"; "an emerging professional class"
       [syn: class, stratum, social class, socio-economic
       class]
    4: education imparted in a series of lessons or meetings; "he
       took a course in basket weaving"; "flirting is not unknown in
       college classes" [syn: course, course of study, course
       of instruction, class]
    5: a league ranked by quality; "he played baseball in class D
       for two years"; "Princeton is in the NCAA Division 1-AA"
       [syn: class, division]
    6: a body of students who graduate together; "the class of '97";
       "she was in my year at Hoehandle High" [syn: class, year]
    7: (biology) a taxonomic group containing one or more orders
    8: elegance in dress or behavior; "she has a lot of class"
    v 1: arrange or order by classes or categories; "How would you
         classify these pottery shards--are they prehistoric?" [syn:
         classify, class, sort, assort, sort out,
         separate]

The Free On-line Dictionary of Computing (19 January 2023):

class

   1.  The prototype for an object in an
   object-oriented language; analogous to a derived type in a
   procedural language.  A class may also be considered to be a
   set of objects which share a common structure and behaviour.
   The structure of a class is determined by the class
   variables which represent the state of an object of that
   class and the behaviour is given by a set of methods
   associated with the class.

   Classes are related in a class hierarchy.  One class may be
   a specialisation (a "subclass") of another (one of its
   "superclasses") or it may be composed of other classes or it
   may use other classes in a client-server relationship.  A
   class may be an abstract class or a concrete class.

   See also signature.

   2.  See type class.

   3.  One of three types of Internet addresses
   distinguished by their most significant bits.

   3.  A language developed by the Andrew Project.
   It was one of the first attempts to add object-oriented
   features to C.

   (1995-05-01)