1. to make stronger or more secure, especially by adding defensive structures
2. to strengthen mentally or emotionally; to encourage
3. to add nutrients or other substances to food or drink to increase its nutritional value

Examples

• The army worked to fortify the castle walls before the siege.
• She fortified herself with a cup of coffee before the long meeting.
• The cereal is fortified with vitamins and minerals.
• They built trenches to fortify their position on the hill.
• Reading inspiring quotes helped fortify his confidence.
• Many breakfast cereals are fortified with iron and B vitamins.
• The general ordered his troops to fortify the border town.