joined or packed together; closely and firmly united; dense; solid

compact soil.

arranged within a relatively small space

a compact shopping center; a compact kitchen.

designed to be small in size and economical in operation.

solidly or firmly built

the compact body of a lightweight wrestler.

expressed concisely; pithy; terse; not diffuse

a compact review of the week's news.

composed or made (usually fol. by of )

a book compact of form and content.

Also, bicompact. Mathematics . (of a set) having the property that in any collection of open sets whose union contains the given set there exists a finite number of open sets whose union contains the given set; having the property that every open cover has a finite subcover.

to join or pack closely together; consolidate; condense.

to make firm or stable.

to form or make by close union or conjunction; make up or compose.

Metallurgy . to compress (metallic or metallic and nonmetallic powders) in a die to be sintered.

to crush into compact form for convenient disposal or for storage until disposal

to compact rubbish.

a small case containing a mirror, face powder, a puff, and sometimes rouge.

Also called compact car. an automobile that is smaller than an intermediate but larger than a subcompact and generally has a combined passenger and luggage volume of 100?110 cu. ft. (2.8?3.1 m 3 ).

Metallurgy . (in powder metallurgy) an object to be sintered formed of metallic or of metallic and nonmetallic powders compressed in a die.

noun

density , solidity