1. (a.) Coming from, being on, or directed toward, the side; as, collateral pressure.

2. (a.) Acting in an indirect way.

3. (a.) 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.

4. (a.) Tending toward the same conclusion or result as something else; additional; as, collateral evidence.

5. (a.) Descending from the same stock or ancestor, but not in the same line or branch or one from the other; -- opposed to lineal.

6. (n.) A collateral relative.

7. (n.) Collateral security; that which is pledged or deposited as collateral security.

accessory accident accidental accompanying addendum addition additional adjunct adscititious adventitious affiliate affiliated agnate agreeing akin aligned allied an analogous ancestry ancillary another appendage appurtenance appurtenant ascititious associate associated attendant attending auxiliary avuncular blood blood relation blood relative bound bracketed casual caution caution money circumstantial clansman closely related coetaneous coeternal coeval coexistent coexisting coextending coextensive cognate coincident coinstantaneous collateral relative collateral security combined coming concomitant concurrent congeneric conjoint conjugate connected connections consanguine consanguinean consanguineous contemporaneous contemporary conterminous contingency contingent contributory correlated correlative coterminous coupled debris deposit distaff side distant relation distantly related enate equal equidistant equispaced even eventual extra family farther fellow final flesh flesh and blood folks forfeit fortuitous foster fresh further garbage german germane happenstance implicated incidental indirect inessential interlinked interlocked interrelated involved isochronal isochronous joined joint junk kelter kin kindred kinfolk kinnery kinsfolk kinsman kinsmen kinswoman kith and kin knotted last lined up linked litter margin matrilateral matrilineal matroclinous mere chance more mutual near relation new next of kin nonconvergent nondivergent nonessential not-self novercal of that ilk of that kind of the blood offal other paired parallel parallelepipedal parallelinervate paralleling parallelodrome parallelogrammatic parallelogrammic parallelotropic patrilateral patrilineal patroclinous people plus posterity related relations relatives riffraff rubbish secondary sib sibling simultaneous spare spear kin spear side spindle kin spindle side spliced stake subsidiary superadded superaddition superfluous supernumerary supervenient supplement supplemental supplementary surplus sword side tied tribesman twin twinned ulterior ultimate unessential unison unisonous uterine uterine kin wed wedded yoked