ردف

6 تَرَادُفٌ ذ is syn. with تَتَابُعٌ. (T, S, O.) You say, تَرَادَفَا They followed each other. (K.) And ترادف القَوْمُ The people, or party, followed one another: and in like manner one says of anything following another thing. (Msb.) [See also 4.] And ترادف الشَّىْءُ The thing was, or became, consecutive in its parts; one part of the thing followed another. (M.) ― -b2- It is also a word alluding to a certain foul act: (M, O:) from الرِّدْفُ signifying العَجُزُ. (M.) You say, (of two boys, or young men, TK,) تَرَادَفَا meaning تَنَاكَحَا. (K.) ― -b3- And تَرَادَفُوا عَلَيْهِ They aided, helped, or assisted, one another against him. (As, S.) And تَرَادَفَا They aided, helped, or assisted, each other; (O, K;) as also ترافدا. (O.) ― -b4- As a conventional term in lexicology, تَرَادُفٌ signifies Synonymousness; or the being synonymous. (Mz, 27th نوع; and Kull p. 130.) [You say, of two words, يَتَرَادَفَانِ They are synonymous. See also 3: and see مُتَرَادِفٌ.]