plural mackerel or mackerels
Definition of mackerel
1 : a scombroid fish (Scomber scombrus of the family Scombridae) of the North Atlantic that is green above with dark blue bars and silvery below and is a commercially important food fish
2 : any of various fishes (such as the wahoo and king mackerel) in the same family as the mackerel especially when distinguished from the related bonito or tuna by a comparatively smaller size
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
“In Vino Veritas” and Other Latin Phrases to Live By
Top 10 Latin Phrases
Word of the Year 2021 | Vaccine
Our Word of the Year 'vaccine,' plus 10 more
Merriam-Webster's Words of the Week - Nov. 26
From the week ending 11/26/2021
What's the Past Tense of 'Green-light'?
Is the project green-lighted? Or greenlit?
Ask the Editors