1. to give reasons for or against something; to present a case or viewpoint
2. to disagree or quarrel with someone, often angrily
3. to persuade someone by giving reasons

Examples

• The lawyer argued that his client was innocent.
• She argued for stricter environmental regulations.
• The children argued about which movie to watch.
• My parents argue frequently about money.
• He argued me into buying the more expensive car.
• The professor argued against the proposed changes.
• They argued over who should pay the bill.