In part Definition 1 of 3Pro Tip 1/3Partial Credit Use 'in part' to acknowledge contribution without giving full credit. The project succeeded in part due to Tim's early efforts. Pro Tip 2/3Shared Cause When explaining reasons, 'in part' suggests there are other factors. Her happiness was in part because of the good news. Pro Tip 3/3Modesty Use 'in part' to modestly imply your own or others' partial contribution. We won the game in part thanks to the coach's strategy.