from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To increase the size, volume, quantity, or scope of; enlarge: expanded her store by adding a second room. See Synonyms at increase.
- transitive v. To express at length or in detail; enlarge on: expanded his remarks afterward.
- transitive v. To open (something) up or out; spread out: The bird expanded its wings and flew off.
- transitive v. Mathematics To write (a quantity) as a sum of terms in an extended form.
- intransitive v. To become greater in size, volume, quantity, or scope: Air expands when heated. This critic's influence is expanding.
- intransitive v. To speak or write at length or in detail: expand on a favorite topic.
- intransitive v. To open up or out; unfold: The chair expands to form a day bed.
- intransitive v. To feel expansive.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To change (something) from a smaller form and/or size to a larger one.
- v. To increase the extent, number, volume or scope of (something).
- v. To express (something) at length and/or in detail.
- v. (algebra) To rewrite (an expression) as a longer, yet equivalent sum of terms.
- v. To (be) change(d) from a smaller form/size to a larger one.
- v. To (be) increase(d) in extent, number, volume or scope.
- v. To speak or write at length or in detail.
- v. To feel generous or optimistic.
- v. To be rewritten as a longer, yet equivalent sum of terms.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To lay open by extending; to open wide; to spread out; to diffuse.
- transitive v. To cause the particles or parts of to spread themselves or stand apart, thus increasing bulk without addition of substance; to make to occupy more space; to dilate; to distend; to extend every way; to enlarge; -- opposed to
- transitive v. To state in enlarged form; to develop. See Expansion, 5.
- intransitive v. To become widely opened, spread apart, dilated, distended, or enlarged
from The Century Dictionary and Cyclopedia
- To spread or stretch out; unfold; display.
- To increase in extent, size, bulk, or amount; inflate; distend; extend: as, to expand the chest by inspiration; heat expands all bodies.
- Hence To make broader in scope or more comprehensive: as, to expand the heart or affections, or the sphere of benevolence.
- To swell, blow up, fill, fill out, increase.
- To open out; become unfolded, spread out, or displayed.
- To increase in extent, size, bulk, amount, etc.; become dilated, distended, or enlarged.
- In zoology, to spread over a certain space: used in stating the distance from tip to tip of outspread wings—in the case of insects, of anterior wings.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. make bigger or wider in size, volume, or quantity
- v. exaggerate or make bigger
- v. expand the influence of
- v. grow vigorously
- v. become larger in size or volume or quantity
- v. extend in one or more directions
- v. add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
Middle English expanden, to spread out, from Latin expandere : ex-, ex- + pandere, to spread; see petə- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
Recorded in Middle English since 1422, from Anglo-Norman espaundre, from Latin expandere present active infinitive of expandō ("to spread out"), itself from ex- ("out, outwards") + pandō ("to spread"). (Wiktionary)