In the world of poker, having a "poker face" means maintaining an inscrutable expression that reveals no hint of one's thoughts or feelings. This ability to keep a straight face is crucial in bluffing, deceiving, or keeping opponents guessing. In everyday life, people often use this phrase to describe someone who remains impassive and unemotional, even in situations where others would show their true feelings.

Synonyms:

1. Deadpan
2. Impassivity
3. Mask
4. Straight-face
5. Expressionless
6. Seriousness
7. Inscrutability

Antonyms:

1. Open-faced
2. Emotional
3. Expressive
4. Revealing
5. Transparent

Examples:

1. "The poker player's poker face was impossible to read."
2. "Wright has a terrific poker face—I could see how he was able to keep things a secret right up through publication."
3. "There was no poker face detected when the Rolling Stones announced that Lady Gaga will join them on a new song."

Idiomatic Expressions:

1. "Keep a poker face" – maintain an inscrutable expression
2. "Have a poker face" – possess the ability to keep a straight face

Word History:

The term "poker face" originated in the mid-19th century, derived from the need for poker players to conceal their emotions during gameplay.

Etymology: The word "poker" refers to the card game, while "face" signifies the facial expression.

Time Traveler: The first known use of "poker face" was in 1874.

Related Entries:

1. Poker (entry 2)
2. Deadpan
3. Impassivity

By exploring the synonyms, antonyms, examples, idiomatic expressions, word history, etymology, and time traveler information provided above, we can better understand the concept of having a "poker face" in various contexts.

Sources:

1. Merriam-Webster Dictionary
2. Oxford English Dictionary
3. Cambridge Dictionary