Definitions

1. noun

a nickname or fictional name for a person, especially a mythical or fictional character.

“He was known as Finnegan, the legendary adventurer of the sea.”

2. proper noun

the name of a 19th-century Irish-American poet and sailor, Samuel Taylor Finnegan, or the title of a poem by James Russell Lowell.

“The Finnegan poem is a classic example of 19th-century American literature.”