subgrade
1subgrade — index poor (inferior in quality) Burton s Legal Thesaurus. William C. Burton. 2006 …
2subgrade — [sub′grād΄] n. a layer of rock or earth leveled and graded for a foundation, as of a road …
3Subgrade — In highway engineering, subgrade is the native material underneath a constructed pavement. It is also called formation level. Explanation Subgrades are commonly compacted before the construction of a pavement, and are sometimes stabilized by the… …
4subgrade — ˈsəb+ˌ noun Etymology: sub + grade 1. : a subordinate level in a scale (as of rank or quality) subgrade is used in some classifications at a supraphylar level 2. : a layer (as a stratum or surface) immediately beneath some principal layer;… …
5subgrade — noun Date: 1893 a surface of earth or rock leveled off to receive a foundation (as of a road) …
6subgrade — /sub grayd /, Civ. Engin., Building Trades. n. 1. the prepared earth surface on which a pavement or the ballast of a railroad track is placed or upon which the foundation of a structure is built. adj. 2. beneath the finished ground level of a… …
7subgrade — noun The layer of native soil on which the foundation of a road is laid …
8subgrade — sub·grade …
9pavement subgrade — The upper part of the soil, natural or constructed, that supports the load transmitted by the runway pavement structure. See pavement structure …
10Track (rail transport) — Permanent way redirects here. For other uses, see Permanent way (disambiguation). Twin rail tracks in a wooded area …
