Definition
The phrase “secondary chord” does not correspond to a widely recognized, formally defined concept in mainstream music theory literature. Consequently, there is no universally accepted definition.
Overview
In informal contexts, musicians sometimes use “secondary chord” to refer loosely to chords that function in a subordinate or derivative role relative to a primary harmonic function. Examples may include chords that serve as the dominant of a chord other than the tonic (commonly called “secondary dominants”), or chords that act as substitutes or embellishments within a progression. However, the term itself is not a standard label in scholarly sources.
Etymology / Origin
The adjective secondary derives from Latin secundarius, meaning “second” or “subordinate.” When combined with chord, it suggests a chord that is secondary in hierarchical importance within a harmonic context. No specific historical origin for the compound term “secondary chord” has been documented in authoritative musicological references.
Characteristics
Because the term is not formally defined, characteristic features are not established. In the limited informal usage that does appear, “secondary chord” may imply:
- A chord that resolves to a chord other than the tonic, often functioning as a temporary dominant.
- A chord inserted to create chromatic interest, such as a tritone substitution or a borrowed chord.
- A chord that is derived from an embellishment or modulation rather than from the primary diatonic scale.
Related Topics
- Secondary dominant – a dominant seventh chord that resolves to a diatonic chord other than the tonic.
- Secondary leading‑tone chord – a leading‑tone chord that resolves to a chord other than the tonic.
- Borrowed chord – a chord taken from the parallel mode or key.
- Tritone substitution – a chord that replaces a dominant by a chord a tritone away.
Accurate information is not confirmed regarding the existence of an established theoretical category named “secondary chord.” The discussion above reflects possible informal uses rather than a formal, encyclopedic entry.