What does vainest mean?

The word "vainest" is the superlative form of the adjective "vain." It means having or showing an excessively high opinion of one's appearance, abilities, or worth. In other words, "vainest" refers to someone who is very egotistical or conceited.

Here are some examples of how the word "vainest" can be used in a sentence:

* "She was the vainest woman I had ever met. She spent hours every day primping and preening in front of the mirror."

* "He was so vain that he couldn't stand the thought of anyone else getting more attention than him."

* "You are probably the vainest person I've ever met," they laughed.