Sideburns are the strips of hair grown down in front of the ears. Long sideburns, trim the sideburns, grow sideburns.
The word is a reversal of a man's name: Ambrose Burnside wore enormous side whiskers, they were called burnsides, and the halves swapped over into sideburns. Few words in English were built that way. They are also called side whiskers.
1nounsideburnsStrips of hair grown down in front of the ears.
“He grew long sideburns to look like a rock star from the seventies.”
sideburns is facial hair.
A reversal of burnsides, named after Ambrose Burnside, an American general famous for his side whiskers.
Reformed from burnside, named after Ambrose Burnside, noted for his unusual facial hair.
Etymology from Wiktionary, CC BY-SA