'Ridgepole' definitions:

Definition of 'ridgepole'

(from WordNet)
noun
A beam laid along the edge where two sloping sides of a roof meet at the top; provides an attachment for the upper ends of rafters [syn: ridge, ridgepole, rooftree]

Definition of 'Ridgepole'

From: GCIDE
  • Ridgepole \Ridge"pole`\, n. (Arch.) The timber forming the ridge of a roof, into which the rafters are secured. [1913 Webster]