(n.) A clause added to a will; a supplement or appendix\.

PS Parthian shot addendum affix afterthought allonge appendix attested copy back matter bequeathal bequest chorus coda colophon commentary conclusion consequence continuance continuation devise double take dying words enclitic envoi epilogue follow-through follow-up infix inheritance interlineation interpolation last words legacy marginalia note parting shot peroration postface postfix postlude postscript prefix probate proclitic refrain rider scholia second thought sequel sequela sequelae sequelant sequent sequitur subscript suffix supplement swan song tag tail testament will