n. & adj.
n. 1 security pledged as a guarantee for repayment of a loan. 2 a person having the same descent as another but by a different line.
adj. 1 descended from the same stock but by a different line. 2 side by side; parallel. 3 a additional but subordinate. b contributory. c connected but aside from the main subject, course, etc. collaterality n. collaterally adv.
[ ME f. med.L collateralis (as COM-, LATERAL) ]