| Unstop 1. (v. t.) To take the stopple or stopper from; as, to unstop a bottle or a cask. 2. (v. t.) To free from any obstruction; to open. Thesaurus Entries bare, clear, deobstruct, disclose, expose, free, manifest, ope, patefy, reveal, unblock, uncase, unclench, unclog, unclutch, uncork, uncover, uncurtain, undo, undrape, unfold, unfoul, unlatch, unlock, unplug, unroll, unseal, unsheathe, unshut, unveil, unwrap |