1. a notice or warning, especially one given in advance
Usage: formal or official context; often used in legal or administrative settings
2. a small, fast warship or dispatch vessel
Usage: nautical; historical

Examples

• The company issued an aviso to all employees about the policy change.
• Without aviso, the meeting was suddenly canceled.
• The captain received an aviso of the approaching storm.
• Legal documents often begin with an aviso to the defendant.
• The naval aviso was used to carry urgent messages between ports.