A collection of subsets ("basis elements") of a set, such that this collection covers the set, and for any two basis elements which both contain an element of the set, there is a third basis element contained in the intersection of the first two, which also contains that element.
A starting point, base or foundation for an argument or hypothesis.
A regular frequency.
A physical base or foundation.
In a vector space, a linearly independent set of vectors spanning the whole vector space.
Amount paid for an investment, including commissions and other expenses.
An underlying condition or circumstance.
The difference between the cash price a dealer pays to a farmer for his produce and an agreed reference price, which is usually the futures price at which the given crop is trading at a commodity exchange.
A set that has a given, elsewhere specified partial order.
The ordered pair comprising a set and its partial order.