Base course
(redirected from Aggregate base coiurse)Also found in: Encyclopedia.
| (Arch.) | The first or lower course of a foundation wall, made of large stones or a mass of concrete; - called also foundation course. (b) The architectural member forming the transition between the basement and the wall above. |
See also: Base
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.