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"argument" is also used as a crossword clue. If that's what you saw, the answer is often row (3 letters).
Definitions
A disagreement, or a set of reasons used to support a claim.
Word origin
From Middle English argument, from Anglo-Norman and Old French arguement, from Latin argumentum. The English word is analysable as argue + -ment. Doublet of argumentum.
Used in a sentence
“Says Plowdon [i.e., Edmund Plowden], the whale so caught belongs to the King and Queen, “because of its superior excellence.” And by the soundest commentators this has ever been held a cogent argument in such matters.”
“For if the Idea be not agreed on, betwixt the Speaker and Hearer, for which the Words ſtand, the Argument is not about Things, but Names.”
“I shuddered when I thought of the possible consequences of my consent; but I felt that there was some justice in his argument.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Set of reasons”8 letters
02“Reasoned disagreement”8 letters
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