Bedrock/ˈbedrɑːk/ Definition 1 of 2Pro Tip 1/3Geological Usage Often used in discussions about Earth sciences and landscape formations. The survey team analyzed the bedrock composition. Pro Tip 2/3Uncover And Reveal Can refer to the process of exposing the solid rock that is usually hidden. Excavation work can uncover the bedrock. Pro Tip 3/3Solid Foundation Metaphorically, implies something very strong and reliable. The pillars rest on sturdy bedrock.