What does aug mean in musical terms?

Aug (or Aug.) is short for augmented, which means "enlarged" or "increased". In musical terms, it is used to describe an interval or chord that is wider than its natural form. For example, an augmented second is a two-step interval that is wider than a major second, and an augmented triad is a three-note chord that is wider than a major triad. Augmented intervals and chords are often used to create tension or dissonance in a piece of music.