1a set or category of things having some property or attribute in common and differentiated from others by kind, type, or quality:it has good accommodation for a hotel of this classa new class of heart drug
Biology a principal taxonomic grouping that ranks above order and below phylum or division, such as Mammalia or Insecta.
British a division of candidates according to merit in a university examination:he received a third class in literae humaniores
2 [mass noun] a system of ordering society whereby people are divided into sets based on perceived social or economic status:people who are socially disenfranchised by class [as modifier]:the class system
[count noun] a social division based on social or economic status:the ruling class
(the classes) archaic the rich or educated.
informal impressive stylishness in appearance or behaviour:she’s got class—she looks like a princess
3a group of students or pupils who are taught together:selected pupils act as representatives for the whole class
an occasion when pupils meet with their teacher for instruction; a lesson:I was late for a class
a course of instruction:I took classes in Indian music
chiefly North American all of the college or school students of a particular year:the class of 1999
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Universal
assign or regard as belonging to a particular category:conduct which is classed as criminal
class A (or B or C) drug
an illegal narcotic drug classified as being of the most harmful and addictive (or a less harmful and addictive) kind, possession or sale of which incurs corresponding legal penalties.
class act
informal a person or thing displaying impressive and stylish excellence:the writing and the look of the magazine make it a real class act
a class apart
much better than others of a similar kind:his songs were definitely a class apart
in a class of its (or one's) own
unequalled, especially in excellence or performance:British advertising is in a class of its own for inventiveness
