A warrior of great strength and courage.
"The mighty knight charged forward to protect his kingdom from the invading army."
In plain English: A mighty is an old-fashioned word for someone who has great power, strength, or importance.
"The mighty was known for his great strength and courage in battle."
Usage: Use this noun to refer specifically to an ancient or legendary hero known for immense physical power, as in the phrase "a mighty champion." Avoid using it simply to describe a modern person who is just very fit or athletic.
having or showing great strength or force or intensity
"struck a mighty blow"
"the mighty logger Paul Bunyan"
"the pen is mightier than the sword"
Very strong; possessing might.
"The mighty storm battered the coast with incredible force."
In plain English: Mighty means extremely strong, powerful, or impressive.
"The mighty river carved its path through the canyon over millions of years."
Very; to a high degree.
"The mighty storm tore through the trees with incredible force."
Mighty comes from Middle English and Old English words meaning "having power," which are equivalent to the modern combination of might plus -y. The word traveled directly into English with its current sense of great strength or influence.