Merriam-Webster's Collegiate® Dictionary, 11th Edition
PINE
I. noun
Usage: often attributive
Etymology: Middle English, from Old English pīn, from Latin pinus; probably akin to Greek pitys pine Date: before 12th century any of a genus ( Pinus of the family Pinaceae, the pine family) of coniferous evergreen trees that have slender elongated needles and include some valuable timber trees and ornamentals, the straight-grained white or yellow usually durable and resinous wood of a pine varying from extreme softness in the white pine to hardness in the longleaf pine, any of various Australian coniferous trees (as of the genera Callitris or Araucaria ), pineapple , bench 1c, piney also piny adjective
II. intransitive verb (pined; pining) see: pain
Date: 14th century
to lose vigor, health, or flesh (as through grief) ; languish , to yearn intensely and persistently especially for something unattainable , see: long