Dictionary (v. t.) To add after something else has been said or written; to ANNEX; as, to subjoin an argument or reason.Thesaurus add adjoin affix agglutinate annex append attach burden complicate conjoin decorate encumber glue on hitch on infix join with ornament paste on plus postfix prefix put with saddle with slap on suffix superadd superpose tack on tag tag on take unite unite with |