Argument: set of statements in which one (conclusion) follows logically from the others (premises).

Sequence of sentences such that some of the sentences (premises) are offered as reasons for accepting another part (conclusion).

Typically in the tradition, a certain type of cognitive (or rational) product in which reasons are offered in support of a claim or thesis. The reasons are said to be the premises of the argument; the conclusion is the thesis supported. It is further held that an argument provides or invites an inference from the premises to the conclusion. Arguments have many and differing uses; they may be used to provide justification, to persuade, to open up lines of inquiry, to test points of view, etc.

Source: What is Good? What is Bad? The Value of All Values across Time, Place and Theories’ by John McMurtry, Philosophy and World Problems, Volume I-III, UNESCO in partnership with Encyclopedia of Life Support Systems: Oxford, 2004-11.