Ponder/ˈpɑːndər/ Definition 1 of 2Pro Tip 1/3Deep Reflection Use 'ponder' when you need to express a deeper level of thought than just 'thinking'. He would often ponder the mysteries of the universe. Pro Tip 2/3Time-Intensive 'Ponder' implies you're spending a considerable amount of time on the thought process. She needed to ponder her choice of university thoroughly. Pro Tip 3/3Serious Matters Commonly, 'ponder' is used for serious, often personal or philosophical topics. After the seminar, he stayed back to ponder over what he had learned.