Muse/mjuːz/ Definition 1 of 4Pro Tip 1/3Use Your Imagination When you muse, you're not just thinking—you're letting your imagination explore possibilities. As the rain fell, she mused on childhood adventures. Pro Tip 2/3Personal Reflection To muse is often a solitary activity, where personal thoughts and reflections take center stage. He spent the evening musing about his future. Pro Tip 3/3Subtle Mood When you muse, the mood is thoughtful and slightly introspective, not urgent or rushed. She mused over the meaning of love.