Composed by Canadian vocalist and songwriter Caity Gyorgy for her debut album No Bounds (2021), "Undefined" is an original ballad that explores the inability to find adequate words to express deep love. The composition opens with a warm, delicate rubato passage for voice and guitar in intimate duet before a gently swinging rhythm section enters, creating a lush, orchestrated texture while preserving the song's emotional restraint. Gyorgy's harmonic language is sophisticated yet accessible, prioritizing vocal expression and storytelling over harmonic density, with spacious accompaniment that keeps the narrative in focus. The tune exemplifies her broader compositional voice, which merges bebop fluency with classic songbook craft, honoring jazz's past while speaking in a modern idiom. Critics have described her original songs as seriously sophisticated, true jazz compositions built on swing and bebop vocabularies, and "Undefined" bears out that assessment through its elegant melodic simplicity and rhythmic sensitivity. No cover versions by other artists have been documented, leaving the No Bounds performance as the definitive recording.