1. communication or cooperation that facilitates a close working relationship between people or organizations
2. a person who acts as a link to assist communication between groups of people
3. a close bond or connection between two people

Examples

• The company established liaisons with several international partners.
• She serves as the liaison between the marketing and sales departments.
• Military liaisons coordinated the joint training exercise.
• The school appointed parent liaisons to improve communication.
• Strong liaisons between research teams led to breakthrough discoveries.
• The diplomatic liaisons helped resolve the trade dispute.
• Community liaisons worked to address neighborhood concerns.