The lowest part of a material thing; the surface of an object on which it stands or rests; the underside, the base.

The lowest part or bottom of an elevation (such as a hill, mountain, etc.), or of any object in an upright or sloping position (such as a wall…

The lowest part or point of something. Now only in phrases 1.

The lowest part or bottom of something; esp. the foot of a hill or mountain; (Geology) the part of a mountain, volcano, or mountain range below the…

The lower or hinder extremity of anything; the part opposite to what is regarded as the head. in general application.

The bottom of anything.

Architecture and Building. The distinct lowest part of a fixed structure.

The lower part, bottom, or under surface of anything. Chiefly in more or less specific uses (cf. 6b).

The bottom of something; the lowest part. Often figurative. Obsolete.

That which serves as a base or support for something; the lowest or bottom part of something.

The lower projecting part of an object, which serves to support it; = foot, n. 16. Obsolete.

That which is in the lowest place; the under part or side.

the underside of something, the base; (also) the area immediately beneath something; cf. topside, n.

The bottom or rear of an object.

Scottish. The bottom or end part of something; esp. (a) the stub of a candle (also Irish English (northern) and English regional (northern) in later…

That part of anything which corresponds in position, form, or otherwise to a ship's keel; the bottom or under surface; a keel-like lower part.