From Longman Dictionary of Contemporary Englishimpulsionim‧pul‧sion /ɪmˈpʌlʃən/ noun [singular, uncountable] formal WANTa strong force or desire that causes something to happen or exist
Examples from the Corpus
impulsion• Up and down hill fences pose problems for the horse by placing a premium on balance and impulsion.• These are rhythm, balance and impulsion.• Enough emphasis can not be laid on the importance of rhythm, balance and impulsion.• The speed must be correct for each fence and impulsion created as necessary.• The degree of the animal's impulsion made the movement appear to be both fast and slow at the same time. 