1. (a.) Written below or underneath; as, iota subscript. (See under Iota.) Specifically (Math.), said of marks, figures, or letters (suffixes), written below and usually to the right of other letters to distinguish them; as, a, n, 2, in the symbols Xa, An, Y2. See Subindex.

2. (n.) Anything written below.

PS Parthian shot addendum afterthought appendix back matter chorus coda codicil colophon conclusion consequence continuance continuation double take dying words envoi epilogue follow-through follow-up last words parting shot peroration postface postfix postlude postscript refrain second thought sequel sequela sequelae sequelant sequent sequitur suffix supplement swan song tag