Definitions

1. noun

a colloquial or affectionate term for a woman, often used as a surname or nickname

“She’s known as Billie in the office, but her full name is Billie Jean.”

2. noun

a female child, especially a young girl

“My little Billie is growing up so fast!”

3. noun

a female who pilots an aircraft, especially a small plane

“She’s a licensed billie with thousands of hours of flight experience.”