a pair of eyebrows that appear to be connected because of some extra hair growing in the space between them: He had very bushy eyebrows, almost a unibrow.
Origin of unibrow
Also called mon·o·brow [mon-uh-brou] /ˈmɒn əˌbraʊ/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the appearance of a single eyebrow as a result of the eyebrows joining above a person's nose
informal a single eyebrow created when the two eyebrows meet in the middle above the bridge of the nose
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012