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impulsive
im·pul·sive [ im púlssiv ]


adjective 
Definition:
 
1. inclined to act on sudden urges: having a tendency to act on sudden urges or desires
2. spontaneous: based on or motivated by impulse
3. physics coming in bursts: acting or coming in short bursts
an impulsive sound
4. acoustics short and percussive: describes a sound that is of short duration and composed of a wide range of frequencies

im·pul·sive·ly adverb
im·pul·sive·ness noun
im·pul·siv·i·ty [ ìm pul sívvətee ] noun
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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