Open up Definition 1 of 5Pro Tip 1/3Emotional Sharing Used when someone is beginning to share personal or intimate details. After months of silence, he finally opened up about his struggles. Pro Tip 2/3Trust Indicator Indicates growing trust in a relationship when someone reveals inner thoughts. I knew we were friends when she opened up about her fears. Pro Tip 3/3Conversation Deepener Marks a transition from superficial to more meaningful conversation. The group opened up about their life goals during the retreat.