SPECIAL ASSUMPSIT, practice. Where an action of assumpsit (q.v.) has been brought on a special contract, and the plaintiff declares upon it, setting out its particular language, or its legal effect. It is distinguished from a general assumpsit, where the plaintiff, instead of setting out the particular language, or effect of the original contract, declares as for a debt, arising out of the execution of the contract, where that constitutes the debt. 3 Bouv. Inst. n. 3426.