/henj/ , n. Archaeol.
a Neolithic monument of the British Isles, consisting of a circular area enclosed by a bank and ditch and often containing additional features including one or more circles of upright stone or wood pillars: probably used for ritual purposes or for marking astronomical events, as solstices and equinoxes.
[ 1730-40; back formation from STONEHENGE, ME Stanenges, Stanheng, equiv. to stan STONE + -heng, prob. orig. "something hanging"; cf. HINGE ]