n Answers to questions and resolution of problems regarding something sold.
n Something which supports. Often used attributively, as a complement or supplement to.
n (mathematics) in relation to a function, the set of points where the function is not zero, or the closure of that set.
n (context|fuzzy set theory) A set whose elements are at least partially included in a given fuzzy set (i.e., whose grade of membership in that fuzzy set is strictly greater than zero).
v (transitive) To keep from falling.
v (transitive) To answer questions and resolve problems regarding something sold.
v (transitive) To back a cause, party etc. mentally or with concrete aid.
v (transitive) To help, particularly financially.
v (transitive) To serve, as in a customer-oriented mindset; to give support to.
v (transitive) To be accountable for, or involved with, but not responsible for.