I. ˈlēn.ˌtü noun
( -s )
Etymology: Middle English lenetoo, from lenen to lean + too, to to
1. : a wing or extension of a building having a single-pitched roof typically built against and supported by the wall of a higher structure with a double-pitch or complete roof ; specifically New England : a section of a barn often so constructed and used to house cows
2. : a rough shelter formed by a sloping roof (as of boughs) supported typically by two uprights (as posts or trees)
II. adjective
: having only one slope or pitch — used of a roof