Entry 1 sense Webster, 1913 Sandemanian · San·de·ma·ni·an · IPA 01 n. A follower of Robert Sandeman, a Scotch sectary of the eighteenth century. See Glassite. 1. A follower of Robert Sandeman, a Scotch sectary of the eighteenth century. See Glassite.(Eccl. Hist.) See: Glassite