What does collaterality mean?
Collaterality is an abstract noun denoting the condition of being collateral — that is, of occupying a side-by-side, parallel, or accompanying position relative to something else, rather than being subordinate to it or descended directly from it. The word derives ultimately from the Latin latus, meaning 'side,' via the Late Latin collateralis. In everyday institutional language, collaterality describes arrangements in which two bodies, ideas, or concerns operate alongside one another as equals or mutual supports, as when economic and social aims are pursued with equal weight. In genealogy and evolutionary biology, it has a more precise technical sense: the relationship between relatives or species that share a common ancestor without forming a direct line of descent, such as cousins within a family tree. Formal and somewhat rare, the word appears mainly in scholarly, legal, and analytical prose, where its precision makes it a valuable term for expressing lateral rather than hierarchical relationships.
nounThe quality or condition of being collateral — that is, of standing in a side-by-side or subordinate but accompanying relationship to something else. In specialized contexts it can denote the relationship between things that share a common origin or ancestor rather than descending directly from one another.
- The state or quality of being collateral: existing side by side or in an accompanying, parallel relationship.
- In genealogy and biology: the relationship between individuals or species that share a common ancestor without being in a direct line of descent.
"The two departments exist in a state of collaterality, each supporting the other without either being subordinate."
"The report emphasized the collaterality of economic and environmental policy, arguing neither should dominate the other."
"In tracing the family tree, she noted the collaterality of her link to the famous author: they shared a great-great-grandparent rather than a direct line."
The plural is rare and generally unnecessary, since the word usually denotes an uncountable quality or relation; it appears only when distinguishing multiple distinct instances of such relationships.
"The study catalogued several collateralities among the regional dialects."
From the Latin latus, meaning 'side,' collaterality literally captures what it means for things to stand shoulder to shoulder rather than one above the other.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of collaterality
Collaterality derives from the adjective collateral, which comes from the Medieval Latin collateralis, formed from the Latin prefix com- ('together') and latus ('side'), yielding the sense 'alongside' or 'on the same side.' The adjective entered English around the early modern period, and the abstract noun collaterality was later coined by adding the Latinate suffix -ity, following the regular English pattern of forming nouns of quality from adjectives. Its closest cognates are the family of words built on latus, including lateral, bilateral, and latitude.
Related word forms
How collaterality is actually used
A formal, relatively rare abstract noun used chiefly in academic, legal, genealogical, and philosophical writing. It carries no strong connotation of its own, taking its tone from context — neutral in most uses.
Easily confused with collaterality
Collaterally is the adverb form describing how something is done in a side-by-side manner, whereas collaterality is the abstract noun naming the state or quality itself.