Definition of Vain:

The word "vain" has a few related meanings:

1. Excessively proud of one's appearance or achievements: This refers to someone who is overly concerned with their looks or accomplishments, often to the point of being self-absorbed.
2. Without real significance or value: It can describe efforts or actions that are futile or pointless, meaning they don’t lead to any meaningful outcome.
3. Empty or worthless: This usage emphasizes a lack of substance or effectiveness.

Usage of Vain:

Here are sentences that use the word "vain":

1. Despite his many talents, he remained vain about his good looks and often sought compliments from others.
2. She realized that her efforts to impress her friends were in vain, as they had already formed their opinions.
3. The artist felt that his work was in vain when it didn’t receive any recognition at the gallery.
4. Her vain obsession with social media likes left her feeling empty and unsatisfied.
5. He tried in vain to convince her to join the team, but she was determined to pursue her own interests.
6. The athlete’s vain attitude made it difficult for him to collaborate with his teammates.
7. After several failed attempts, they acknowledged that their plan was in vain and decided to start over.
8. She wore a beautiful dress, but her vain desire to stand out only made her feel more self-conscious.
9. The politician's promises turned out to be vain, leaving many constituents disillusioned.
10. He was so vain that he would take multiple selfies each day, just to see how he looked from different angles.

Synonyms of Vain:

Here are some synonyms for the word "vain," based on its different meanings:

1. Proud
2. Conceited
3. Arrogant
4. Self-important
5. Narcissistic
6. Futile
7. Fruitless
8. Ineffective
9. Empty
10. Worthless