1. Plural of lieu; instead of or in place of something else.
Usage: Most commonly used in the phrase 'in lieu of'

Examples

• In lieu of flowers, the family requested donations to charity.
• The company offered extra vacation days in lieu of a bonus.
• She accepted a gift card in lieu of cash.
• The event was postponed; in lieu of the original date, a new one was announced.
• He sent a representative in lieu of attending the meeting himself.