1400-50;late Middle English (Scots); as adv., unexplained variant of late Middle Englishbin,Middle Englishbinne,Old Englishbinnan (cognate with Old Frisianbinna,Middle Dutch,Germanbinnen), equivalent to bi-be- + innan within (cf. in)
any of several Asiatic trees of the genus Moringa, esp M. oleifera of Arabia and India, whose seeds yield oil of ben, used in manufacturing perfumes and cosmetics, lubricating delicate machinery, etc: family Moringaceae
the seed of such a tree
C15: from Arabic bān
(Scot & Irish) a mountain peak (esp in place names): Ben Lomond
"mountain peak" in Celtic place names (especially of roughly pyramidal peaks standing alone), from Gaelic beinn, from Old Irish *benno- "peak, horn, conical point," from PIE root *bend- "projecting point."