سمدعسَمَيْدَعٌ, (S, K, &c.,) of the measure فَعَيْلَلٌ, (Sb, TA,) so accord. to the grammarians, but Aboo-Usámeh Junádeh El-Azdee says that it is of the measure فَمَيْعَلٌ, from سَدْعٌ as syn. with ذَبْحٌ and بَسْطٌ, (Sgh, TA,) pronounced by the vulgar سُمَيْدَع, with damm to the س, (IDrst, TA,) which is a mistake, (Th, IDrst, S, K, &c.,) for there is not in the language of the Arabs a noun of the measure فُعَيْلَلٌ, (IDrst, TA,) A lord, master, chief, prince, or man of rank or quality; ('Eyn, S, O, K;) to which Et-Teiyánee adds, from As, on the authority of Munteji' Ibn-Nebhán, (TA,) of easy nature or disposition, generous, and very hospitable, or in whose vicinity his companion has power or authority or dignity, not being harmed nor inconvenienced; (S, K, TA;) and thus expl. by AHát also; (TA;) generous; noble, or elevated in rank; liberal, bountiful, or munificent: (O, K:) and also (K) courageous: (Lth, K:) and goodly, and stout, bulky, or corpulent: (Az, EtTeiyánee:) pl. سَمَادِعُ. (IJ.) b2:  The lion. (Ibn-Ed-Dahhán, T, S, O.) b3:  And hence, [accord. to SM, but the reverse I think more probable,] (tropical:)  A chief, or person of authority. (TA.) b4:  The wolf; (En-Nadr, K;) because of his swiftness. (En-Nadr.) b5:  And hence, (TA,) (tropical:)  A man active, agile, or prompt, in accomplishing his wants. (K, TA.) b6:  And A sword. (K.)