Accelerate/əkˈseləreɪt/ Definition 1 of 3Pro Tip 1/2Urgency Expression Used to express the need to hurry or increase speed in actions or processes. We need to accelerate our efforts to meet the deadline. Pro Tip 2/2Timely Completion Implies an action is done faster for timely achievement or completion. To finish the project on time, we must accelerate our pace.