rare. [f. SUPPOSE v. + -ER1.] One who supposes, in various senses; † one who makes a statement or allegation (obs.); one who frames a hypothesis or makes an assumption.
1593. Mundy, Def. Contraries, 10. Some good supposer may say, that riches serve for a pleasant and recreative life.
1678. R. Russell, trans. Geber, II. I. II. iv. 50. Every one of these Supposers is adverse to the other according to his Supposition.
1747. Richardson, Clarissa (1811), I. xxvi. 185. You never knew so bold a supposer.
