Definition of Sonder: Sonder (noun): The realization that each random passerby is living a life as vivid and complex as your own—filled with their own ambitions, friends, routines, worries, and inherited craziness. Synonyms: empathy, awareness, realization, mindfulness Antonyms: obliviousness, indifference, insensitivity, detachment Memory Tip: Think of “sonder” as the moment you realize everyone has their…