Coda (Italian for "tail"; from the Latin cauda), in music, is a passage which brings a movement or a separate piece to a conclusion through prolongation. This developed from the simple chords of a cadence into an elaborate and independent form. In a series of variations on a theme or in a composition with a fixed order of subjects, the coda is a passage sufficiently contrasted with the conclusions of the separate variations or subjects, added to form a complete conclusion to the whole.

In music notation, the coda symbol is used as a navigation marker, similarly to the dal Segno sign. It looks like a large O with a + superimposed.

Charles Burkhart (2005, p.12) suggests that the reason codas are common, even necessary, is that in the climax of the main body of a piece a "particularly effortful passage", often an expanded phrase, is often created by the "working [of] an idea through to its structural conclusions" and that after all this momentum is created a coda is required to "look back" on the main body, allow listeners to "take it all in", and "create a sense of balance."

In phonology, a syllable coda comprises the consonant sounds of a syllable that follow the nucleus, which is usually a vowel.

CODA (an acronym for CEBAF on-line data aquisition, where CEBAF is an acronym for continuous electron beam accelerator facility) is a data acquisition system mainly used for nuclear physics, developed beginning in the late 1980s at the Thomas Jefferson National Accelerator Facility ("Jefferson Lab") and first introduced in the Ultrix operating system but also available in embedded systems using VxWorks.

Co-Dependents Anonymous (CoDA) - ist eine Selbsthilfegruppe für Co-Abhängige Menschen, deren gemeinsames Problem die Unfähigkeit ist, gesunde Beziehungen einzugehen und aufrechtzuerhalten.