A palindrome is a word, phrase, number, or other sequence of characters which reads the same backward as forward, e.g., "madam" or "racecar".
Here are some examples:
* Words: level, rotor, kayak
* Phrases: "A man, a plan, a canal: Panama!"
* Numbers: 121, 353, 9009
Let me know if you'd like to explore more examples or learn about the different types of palindromes!