adj. Coming from, being on, or directed toward, the side; as, collateral pressure. Acting in an indirect way. Related to, but not strictly a part of, the main thing or matter under consideration; hence, subordinate; not chief or principal; as, collateral interest; collateral issues. Tending toward the same conclusion or result as something else; additional; as, collateral evidence.
- (Genealogy) Descending from the same stock or ancestor, but not in the same line or branch or one from the other; - opposed to lineal. Lineal descendants proceed one from another in a direct line; collateral relations spring from a common ancestor, but from different branches of that common stirpes or stock. Thus the children of brothers are collateral relations, having different fathers, but a common grandfather. Collateral assurance, that which is made, over and above the deed itself.
- Collateral circulation (Med. & Physiol.), circulation established through indirect or subordinate branches when the supply through the main vessel is obstructed.
- Collateral issue. (Law) (a) An issue taken upon a matter aside from the merits of the case. (b) An issue raised by a criminal convict who pleads any matter allowed by ...