[ad. L. fidejussiōn-em, n. of action f. fide-jubēre: see next.] A giving or being surety or bail; suretyship.
1657. Faringdon, 30, Serm. i. 15. If he will be a surety, such is the nature of fidejussion and suretiship, he must.
Hence Fidejussionary a.
1880. Muirhead, Gaius, IV. § 137. [He] gave his fidejussionary undertaking for Lucius Titius for something indefinite.
