1. close acquaintance with or knowledge of something
Usage: plural of familiarity
2. informal or friendly behaviors or attitudes
Usage: plural of familiarity

Examples

• Her familiarities with different programming languages made her a valuable employee.
• The teacher’s familiarities with various teaching methods helped engage all students.
• His familiarities with the local customs impressed the residents.
• The guide’s familiarities with the hiking trails ensured a safe journey.
• Their familiarities with each other grew over years of working together.
• The coach discouraged excessive familiarities between players and staff.