Definition & Meaning of "more than meets the eye"

What is the origin of the idiom "more than meets the eye" and when to use it?

The idiom "more than meets the eye" originated from the notion that there is often a deeper or hidden meaning, significance, or complexity to a person, situation, or object that may not be immediately apparent upon initial observation. The phrase is used only to suggest that there is something beyond the surface level or initial impression, emphasizing the need for further exploration or investigation to fully understand or appreciate the true nature or extent of something.