Impetus/ˈɪmpɪtəs/ Definition 1 of 3Pro Tip 1/3Motivation Catalyst Impetus often refers to what motivates a process or action to start or accelerate. The CEO's vision served as the impetus for the company's overhaul. Pro Tip 2/3Positive Change Impetus frequently implies positive momentum or progress in various situations. The new investment was the impetus needed to expand the business. Pro Tip 3/3Action Trigger Impetus can identify the crucial trigger that leads to subsequent actions or responses. Public opinion provided the impetus for policy change.