Having a capacity or tendency to expand or dilate; diffusive; of much expanse; wide-extending; as, the expansive force of heat; the expansive quality of air. [1913 Webster]
"A more expansive and generous compassion." [1913 Webster]

"His forehead was broad and expansive."
causing expansion; as, the expansive force of heat. [1913 Webster]
of much expanse; wide-extending; as, an expansive view of the mountains. [PJC]
friendly, open, and unrestrained in conversation or discourse; -- of people; as, wine made the guest expansive. [WordNet 1.5]
characterized by exaggerated feelings of euphoria and delusions of grandeur. [WordNet 1.5]

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OXFORD DICTIONARY

expansive, adj.
1 able or tending to expand.
2 extensive, wide-ranging.
3 (of a person, feelings, or speech) effusive, open.

Derivative

expansively adv. expansiveness n. expansivity n.

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THESAURUS

expansive

accessible, affable, airy, all jaw, all-embracing, all-inclusive, amiable, ample, amplitudinous, approachable, big, bouncy, broad, buoyant, candid, capacious, chatty, commodious, communicable, communicative, comprehensive, conversable, conversational, copious, deep, demonstrative, dilatable, dilatant, distensive, easy, effervescent, effusive, elastic, enlarging, expandable, expanding, expansible, expansile, expansional, extendable, extended, extending, extensible, extensile, extensional, extensive, extroverted, far-reaching, flip, fluent, frank, free, free-speaking, free-spoken, free-tongued, friendly, full, gabby, garrulous, gassy, generous, genial, glib, gossipy, great, gregarious, gushy, infinite, inflatable, inflationary, large, lavish, liberal, long-winded, loquacious, multiloquent, multiloquious, newsy, open, openhanded, outgoing, outspoken, overtalkative, prolix, resilient, roomy, scopic, self-revealing, self-revelatory, smooth, sociable, spacious, spreading, talkative, talky, unconstrained, unhampered, unrepressed, unreserved, unrestrained, unrestricted, unreticent, unsecretive, unshrinking, unsilent, unsuppressed, vast, verbose, volatile, voluble, voluminous, warm, wide, wide-ranging, widespread, windy

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ROGET THESAURUS

expansive

Space

N space, extension, extent, superficial extent, expanse, stretch, hyperspace, room, scope, range, field, way, expansion, compass, sweep, swing, spread, dimension, length, distance, size, volume, hypervolume, latitude, play, leeway, purchase, tolerance, room for maneuver, spare room, elbow room, house room, stowage, roomage, margin, opening, sphere, arena, open space, free space, void, waste, wildness, wilderness, moor, moorland, campagna, abyss, unlimited space, infinity, world, ubiquity, length and breadth of the land, proportions, acreage, acres, acres and perches, roods and perches, hectares, square miles, square inches, square yards, square centimeters, square meters, yards (clothing), ares, arpents, spacious, roomy, extensive, expansive, capacious, ample, widespread, vast, world-wide, uncircumscribed, boundless, shoreless, trackless, pathless, extended, extensively, wherever, everywhere, far and near, far and wide, right and left, all over, all the world over, throughout the world, throughout the length and breadth of the land, under the sun, in every quarter, in all quarters, in all lands, here there and everywhere, from pole to pole, from China to Peru, from Indus to the pole, from Dan to Beersheba, from end to end, on the face of the earth, in the wide world, from all points of the compass, to the four winds, to the uttermost parts of the earth.

Expansion

N expansion, increase of size, enlargement, extension, augmentation, amplification, ampliation, aggrandizement, spread, increment, growth, development, pullulation, swell, dilation, rarefaction, turgescence, turgidness, turgidity, dispansion, obesity, hydrocephalus, hydrophthalmus, dropsy, tumefaction, intumescence, swelling, tumor, diastole, distension, puffing, puffiness, inflation, pandiculation, dilatability, expansibility, germination, growth, upgrowth, accretion, budding, gemmation, overgrowth, overdistension, hypertrophy, tympany, bulb, plumper, superiority of size, big bang, Hubble constant, expanded larger, &c (large), swollen, expansive, wide open, wide spread, flabelliform, overgrown, exaggerated, bloated, fat, turgid, tumid, hypertrophied, dropsical, pot bellied, swag bellied, edematous, oedematous, obese, puffy, pursy, blowzy, bigswoln, distended, patulous, bulbous, full blown, full grown, full formed, big, abdominous, enchymatous, rhipidate, tumefacient, tumefying.

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