[ plas-tik ]
/ ˈplæs tɪk /
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See synonyms for: plastic / plastics on Thesaurus.com

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Origin of plastic

1625–35; 1900–10 for def. 1; <Latin plasticus that may be molded <Greek plastikós.See -plast, -ic


plas·ti·cal·ly, plas·tic·ly, adverbnon·plas·tic, adjective, nounun·plas·tic, adjective

Other definitions for plastic (2 of 2)


a combining form occurring in chloroplastic; protoplastic.

Origin of -plastic

see origin at plastic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use plastic in a sentence

British Dictionary definitions for plastic (1 of 2)

/ (ˈplæstɪk, ˈplɑːs-) /

any one of a large number of synthetic usually organic materials that have a polymeric structure and can be moulded when soft and then set, esp such a material in a finished state containing plasticizer, stabilizer, filler, pigments, etc. Plastics are classified as thermosetting (such as Bakelite) or thermoplastic (such as PVC) and are used in the manufacture of many articles and in coatings, artificial fibres, etcCompare resin (def. 2)
short for plastic money

Derived forms of plastic

plastically, adverb

Word Origin for plastic

C17: from Latin plasticus relating to moulding, from Greek plastikos, from plassein to form

British Dictionary definitions for plastic (2 of 2)


adj combining form
growing or formingneoplastic

Word Origin for -plastic

from Greek plastikos; see plastic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for plastic (1 of 2)

[ plăstĭk ]

Capable of being shaped or formed.
Easily influenced; impressionable.
Capable of building tissue; formative.
Any of various organic compounds produced by polymerization, capable of being molded, extruded, cast into various shapes and films, or drawn into filaments used as textile fibers.

Other words from plastic

plas•tici•ty (plăs-tĭsĭ-tē) n.

Medical definitions for plastic (2 of 2)


Forming; growing; changing; developing:neoplastic.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for plastic

[ plăstĭk ]

Any of numerous substances that can be shaped and molded when subjected to heat or pressure. Plastics are easily shaped because they consist of long-chain molecules known as polymers, which do not break apart when flexed. Plastics are usually artificial resins but can also be natural substances, as in certain cellular derivatives and shellac. Plastics can be pressed into thin layers, formed into objects, or drawn into fibers for use in textiles. Most do not conduct electricity well, are low in density, and are often very tough. Polyvinyl chloride, methyl methacrylate, and polystyrene are plastics. See more at thermoplastic thermosetting.
Capable of being molded or formed into a shape.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.