Then  —adv. 1 at that time. 2 a next; after that. B and also. 3 a in that case (then you should have said so). B implying grudging or impatient concession (all right then, if you must). C used parenthetically to resume a narrative etc. (the policeman, then, knocked on the door). —attrib. Adj. Such at the time in question (the then king). —n. That time (until then).  then and there immediately and on the spot. [old english]