Definitions

1. noun

A thin and delicate person, especially a young girl.

“The waif of a child wandered through the abandoned streets.”

2. verb

To lose weight or become thin, especially to the point of looking unhealthy.

“After the diet, she began to waif away in front of the mirror.”

3. verb

To waste or squander something, especially time or resources.

“He spent all his money and began to waif his future away.”