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class  (kls)
1. A set, collection, group, or configuration containing members regarded as having certain attributes or traits in common; a kind or category.
2. A division based on quality, rank, or grade, as:
a. A grade of mail: a package sent third class.
b. A quality of accommodation on public transport: tourist class.
a. A social stratum whose members share certain economic, social, or cultural characteristics: the lower-income classes.
b. Social rank or caste, especially high rank.
c. Informal Elegance of style, taste, and manner: an actor with class.
4. A level of academic development, as in an elementary or secondary school.
a. A group of students who are taught together because they have roughly the same level of academic development.
b. A group of students or alumni who have the same year of graduation.
c. A group of students who meet at a regularly scheduled time to study the same subject.
d. The period during which such a group meets: had to stay after class.
6. Biology A taxonomic category ranking below a phylum or division and above an order. See Table at taxonomy.
7. Statistics An interval in a frequency distribution.
8. Linguistics A group of words belonging to the same grammatical category that share a particular set of morphological properties, such as a set of inflections.
tr.v. classed, class·ing, class·es
To arrange, group, or rate according to qualities or characteristics; assign to a class; classify.

[French classe, from Latin classis, class of citizens; see kel-2 in Indo-European roots.]

class [klɑːs]
1. a collection or division of people or things sharing a common characteristic, attribute, quality, or property
2. (Sociology) a group of persons sharing a similar social position and certain economic, political, and cultural characteristics
3. (Philosophy) (in Marxist theory) a group of persons sharing the same relationship to the means of production
4. (Sociology)
a.  the pattern of divisions that exist within a society on the basis of rank, economic status, etc.
b.  (as modifier) the class struggle class distinctions
5. (Social Science / Education)
a.  a group of pupils or students who are taught and study together
b.  a meeting of a group of students for tuition
6. (Social Science / Education) Chiefly US a group of students who graduated in a specified year the class of 53
7. (Social Science / Education) (in combination and as modifier) Brit a grade of attainment in a university honours degree second-class honours
8. one of several standards of accommodation in public transport See also first class, second class, third class
a.  Informal excellence or elegance, esp in dress, design, or behaviour that girls got class
b.  (as modifier) a class act
10. (Individual Sports & Recreations / Horse Racing)
a.  outstanding speed and stamina in a racehorse
b.  (as modifier) the class horse in the race
11. (Life Sciences & Allied Applications / Biology) Biology any of the taxonomic groups into which a phylum is divided and which contains one or more orders. Amphibia, Reptilia, and Mammalia are three classes of phylum Chordata
12. (Mathematics) (Philosophy / Logic) Maths Logic
a.  another name for set2 [3]
proper class a class which cannot itself be a member of other classes
in a class of its own or in a class by oneself unequalled; unparalleled
to have or assign a place within a group, grade, or class
[from Latin classis class, rank, fleet; related to Latin calāre to summon]
classable  adj
classer  n

class  (kls)
A taxonomic category of organisms ranking above an order and below a phylum or division. In modern taxonomic schemes, the names of classes end in -phyceae for the various groups of algae, -mycetes for fungi, and -opsida for plants (as in Liliopsida, the class of plants also termed monocotyledons). The names of classes belonging to phyla of the animal kingdom, however, are formed in various ways, as Osteichthyes the bony fishes, Aves, the birds, and Mammalia, the mammals, all of which are classes belonging to the subphylum Vertebrata (the vertebrates) in the phylum Chordata. See Table at taxonomy.

class  /kls/  n. classes 1 [C;U] a level in society based on money, education, and family standing: There are four social classes in the USA, namely the upper class, middle class, working class, and lower class. 2 [C] a group whose members have at least one similarity, (syn.) category: A motorcycle belongs to a different class of vehicle from cars and trucks. 3 [C] a. a meeting between teacher and students for educational purposes: My English class meets at 10:00 A.M. b. the students in such a meeting: The class listened and took notes. 4 [C] a group of students who will finish school in the same year: He graduated with the class of 1995. 5 in a class by itself: much better than everything else of its kind 6 slang to have class: to show high quality in appearance and manners: She always looks great and knows the right thing to say; she has a lot of class. See: classy.

Thesaurus: class 1 (ones) socioeconomic group, rank, station 2 a classification, kind, type 3a a
course, lesson. class

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