- 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 followed 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 m3).
- Metallurgy. (in powder metallurgy) an object to be sintered formed of metallic or of metallic and nonmetallic powders compressed in a die.
Origin of compact1
SynonymsSee more synonyms on Thesaurus.com
Examples from the Web for compactness
Rather, that research suggests that size, not compactness, constitutes the decisive factor.Houston Rising—Why the Next Great American Cities Aren’t What You Think
April 8, 2013
Size, shape, compactness and the number of clusters on a shoot must be noted.Manual of American Grape-Growing
U. P. Hedrick
The feathers, their warmth, and compactness for shedding water.Ontario Teachers' Manuals: Nature Study
Ontario Ministry of Education
Australian Handbook (admirable for its wisdom and compactness).The Caxtons, Complete
The most remarkable thing about the book was its maturity and compactness.A Collection of Stories, Reviews and Essays
The Compactness yet completeness will make it a favorite with agriculturists.Mysteries of Bee-keeping Explained
- closely packed together; dense
- neatly fitted into a restricted space
- concise; brief
- well constructed; solid; firm
- (foll by of) composed or made up (of)
- denoting a tabloid-sized version of a newspaper that has traditionally been published in broadsheet form
- logic (of a relation) having the property that for any pair of elements such that a is related to b, there is some element c such that a is related to c and c to b, as less than on the rational numbers
- US and Canadian (of a car) small and economical
- to pack or join closely together; compress; condense
- (foll by of) to create or form by pressing togethersediment compacted of three types of clay
- metallurgy to compress (a metal powder) to form a stable product suitable for sintering
- a small flat case containing a mirror, face powder, etc, designed to be carried in a woman's handbag
- US and Canadian a comparatively small and economical car
- metallurgy a mass of metal prepared for sintering by cold-pressing a metal powder
- a tabloid-sized version of a newspaper that has traditionally been publis hed in broadsheet form
- an official contract or agreement
Word Origin and History for compactness
early 15c., from Latin compactus, past participle of compingere "to fasten together" (see compact (adj.)). Related: Compacted; compacting.
"make-up case," 1921, from compact (adj.), based on its containing compacted face powder.