Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Closely and firmly united or packed together; dense: compact clusters of flowers.
  • adj. Occupying little space compared with others of its type: a compact camera; a compact car.
  • adj. Brief and to the point; concise: a compact narration.
  • adj. Marked by or having a short solid physique: a wrestler of compact build.
  • transitive v. To press or join firmly together: a kitchen device that compacted the trash.
  • transitive v. To make by pressing or joining together; compose.
  • transitive v. To consolidate; combine.
  • intransitive v. To be capable of being pressed tightly together or to become so pressed: garbage that compacts easily.
  • n. A small case containing a mirror, pressed powder, and a powder puff.
  • n. An automobile that is bigger in size than a subcompact but smaller than an intermediate.
  • n. An agreement or a covenant. See Synonyms at bargain.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Closely packed, i.e. packing much in a small space.
  • adj. Having all necessary features fitting neatly into a small space.
  • adj. Closed and bounded.
  • adj. Such that every exhaustion of it by (overlapping) open balls has the property that some finitely many of those balls will also cover it.
  • adj. Such that every open cover of the given set has a finite subcover.
  • n. A small, slim folding case, often featuring a mirror, powder and a powderpuff; that fits into a woman's purse or handbag, or that slips into ones pocket.
  • n. A broadsheet newspaper published in the size of a tabloid but keeping its non-sensational style.
  • v. To make more dense; to compress.
  • n. An agreement or contract.

from the GNU version of the Collaborative International Dictionary of English

  • n. An agreement between parties; a covenant or contract.
  • Joined or held together; leagued; confederated.
  • Composed or made; -- with of.
  • Closely or firmly united, as the particles of solid bodies; firm; close; solid; dense.
  • Brief; close; pithy; not diffuse; not verbose.
  • transitive v. To thrust, drive, or press closely together; to join firmly; to consolidate; to make close; -- as the parts which compose a body.
  • transitive v. To unite or connect firmly, as in a system.

from The Century Dictionary and Cyclopedia

  • Closely and firmly united, as the parts or particles of solid bodies; having the parts or particles pressed or packed together; solid; dense: as, a compact mass of people.
  • In entomology, specifically, compacted or pressed close, as a jointed organ, or any part of it, when the joints are very closely united, forming a continuous mass: as, a compact antennal club; compact palpi.
  • Connected or expressed with closeness or brevity, as ideas; hence, of literary style, pithy; terse; not diffuse; not verbose: as, a compact discourse.
  • Compacted; joined; held together.
  • Composed; consisting; made.
  • Synonyms Firm, condensed.
  • Terse, sententious, succinct concise.
  • n. Structure; frame.
  • To thrust, drive, pack, or press closely together; join firmly; consolidate, as the parts which compose a body; condense.
  • To unite or connect firmly, as in a system; join the parts of tightly; bring into close junction, as the sheets of a book or other loose materials, by heating, pressure, or the like.
  • To make firm or stable; establish firmly; confirm; solidify.
  • United in a compact; leagued; confederated.
  • To make a contract or enter into an agreement.
  • In petrography, dense without pores: also applied to extremely fine-grained textures in which the individual crystals or grains cannot be seen by the unaided eye: equivalent to aphanitic, cryptocrystalline, and cryptoclastic.
  • n. An agreement; a contract between parties; in general, any covenant or contract between individuals, members of a community, or nations.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. make more compact by or as if by pressing
  • n. a signed written agreement between two or more parties (nations) to perform some action
  • adj. briefly giving the gist of something
  • n. a small and economical car
  • v. squeeze or press together
  • adj. closely and firmly united or packed together
  • v. have the property of being packable or of compacting easily
  • n. a small cosmetics case with a mirror; to be carried in a woman's purse
  • adj. having a short and solid form or stature
  • v. compress into a wad

Etymologies

Middle English, from Latin compāctus, past participle of compingere, to put together : com-, com- + pangere, to fasten; see pag- in Indo-European roots.
Latin compactum, neuter past participle of compacīscī, to make an agreement : com-, com- + pacīscī, to agree; see pact.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin compactum ("agreement"). (Wiktionary)
From Middle English, from Latin compāctus, perfect passive participle of compingō ("join together"), from com- ("together") + pangō ("fasten"), from Proto-Indo-European *pag- (“to fasten”). (Wiktionary)

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