جَدَفٌ

A grave; a sepulchre; (S, Msb, K;) like جَدَثٌ; for the Arabs made ف and ث interchangeable: (Fr, S:) the former is of the dialect of Nejd; and the latter, of the dialect of Tihámeh: (Msb in article جدث:) [according to some,] the former is formed from the latter by substitution [of ف for ث]: (S:) IJ argues that this is the case because the former has not أَجْدَافٌ for plural: (TA:) but it has this plural, (Fr, S, R, TA,) used by Ru-beh. (R, TA.)

Also, said in a tradition to be the beverage of the jinn, or genii, (S, TA,) Beverage that has not been covered [at night according to a precept of the Prophet]: (Katádeh, S, K:) or of which the mouth of the skin containing it has not been tied [at night]: (K:) or a certain plant of El-Yemen, the eater of which needs not to drink after it: (S, K:) or a certain plant of El-Yemen, eaten by camels, which thereby become in no need of water: (M, TA:) or the froth, or floating particles, cast up by beverage; (El-'Otbee, Hr, K;) as though it were cut off from the beverage. (El-'Otbee, Hr, TA.)