A substance that provides a pair of electrons for a covalent bond with an acid.The distinctively treated lowermost portion of any construction, as a monument, exterior wall, etc.

A solution of a base in water turns litmus paper blue, produces hydroxyl ions, and has a pH greater than.A starting line or point for runners, racing cars, etc.A collection of subsets of a topological space having the property that every open set in the given topology can be written as the union of sets of the collection.

To make or form a base or foundation for.Not caring what people think, living in a mansion, doing what you want, how you want.