Search Result for "intrusive": 
Wordnet 3.0

ADJECTIVE (3)

1. tending to intrude (especially upon privacy);
- Example: "she felt her presence there was intrusive"

2. of rock material; forced while molten into cracks between layers of other rock;

3. thrusting inward;
- Example: "an intrusive arm of the sea"

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3 definitions retrieved:

The Collaborative International Dictionary of English v.0.48:

Intrusive \In*tru"sive\, a. Apt to intrude; characterized by intrusion; entering without right or welcome. [1913 Webster] Intrusive rocks (Geol.), rocks which have been forced, while in a plastic or melted state, into the cavities or between the cracks or layers of other rocks. The term is sometimes used as equivalent to plutonic rocks. It is then contrasted with effusive or volcanic rocks. -- In*tru"sive*ly, adv. -- In*tru"sive*ness, n. [1913 Webster]
WordNet (r) 3.0 (2006):

intrusive adj 1: tending to intrude (especially upon privacy); "she felt her presence there was intrusive" [ant: not intrusive, unintrusive] 2: of rock material; forced while molten into cracks between layers of other rock [ant: extrusive] 3: thrusting inward; "an intrusive arm of the sea" [ant: protrusive]
Moby Thesaurus II by Grady Ward, 1.0:

97 Moby Thesaurus words for "intrusive": alien, barbarian, barbaric, barbarous, busy, entering, exotic, exterior, external, extraneous, extraterrestrial, extrinsic, foreign, foreign-born, forward, frantic, frenetic, frenzied, hectic, hyperactive, hyperkinetic, ill-considered, ill-seasoned, ill-timed, importunate, improper, in, inappropriate, inauspicious, inbound, incoming, inconvenient, inexpedient, infelicitous, inflooding, inflowing, ingoing, ingressive, inopportune, inpouring, inquisitive, intempestive, interfering, interruptive, intervenient, intruding, invasive, inward, inward-bound, irrelevant, irruptive, late, mal a propos, malapropos, meddlesome, meddling, mistimed, nosy, obtrusive, off base, officious, out of line, out of phase, out of time, outland, outlandish, outside, premature, presumptuous, prying, pushy, snoopy, strange, too late, too soon, ulterior, unbefitting, uncalled-for, unearthly, unfavorable, unfit, unfitting, unfortunate, unhandy, unhappy, unlucky, unpropitious, unready, unripe, unseasonable, unsought, unsuitable, untimely, untoward, unwanted, unwelcome, wrong