Something is incredible if it's extremely good or impressive in some way.
You've probably heard the word used a lot in everyday conversations. When people describe something as incredible, they usually mean that it's amazing or unbelievable. For example, someone might say "I just saw the most incredible sunset!" and you know what they mean - it was truly breathtaking and left them speechless.
How common is "incredible"?
Word incredible is considered uncommon in modern English. It has a balanced usage among all categories: speech, fiction, newspapers and academic texts.
Definitions
adjective
Too implausible to be credible; beyond belief; unbelievable.
Amazing; astonishing; awe-inspiring.
Example: He was so wrapped up in watching the incredible special effects that he couldn't keep track of the story.
Marvellous; profoundly affecting; wonderful.
Example: I had such an incredible slice of pizza last night that I simply can't think about anything else.