1. The lowest (and often widest) visible part of a building, often distinctively treated. A base is distinguished from a foundation or footing in being visible rather than buried.

2. A low, thickened section of a wall; a wall base. Also see socle.

3. Lower part of a column or pier, wider than the shaft, and resting on a plinth, pedestal, podium, or stylobate. Also see Asiatic base, Attic base.

4. A baseboard; skirting.

5. A preparation for a finished surface, as for flooring, stucco, paint, etc.; a surface to which the base coat of plaster is applied. Also see backing, ground.

6. In paint, either the medium or the main chemical ingredient.

7. In asphaltic or portland cement concrete paving, the prepared bottom course of crushed stone or gravel upon which subsequent courses are laid; serves to distribute localized wheel loads over a larger subbase and hence to improve loadbearing capacity.

8. The lowest point of any vertical pipe.bases

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