Overzealous/ˌəʊvərˈzeləs/ Definition 1 of 1Pro Tip 1/3Negative Connotation Suggests excessive behavior or effort beyond what is reasonable or appropriate. His overzealous approach caused tension in the team. Pro Tip 2/3Excess Energy Implies more energy or enthusiasm than necessary, can be overwhelming. The overzealous cheering of the crowd made the players anxious. Pro Tip 3/3Potential Negative Impact Use implies possible negative side effects of being excessively eager. Her overzealous cleaning stripped the finish from the wood.