Bible Dictionary
FLAT NOSE
A flat nose, probably a severely depressed or malformed nose, was listed among bodily blemishes disqualifying a descendant of Aaron from serving at the altar.
Biblical Usage
Leviticus 21:18 includes the condition among bodily blemishes that prevented a priestly family member from offering the bread of God at the altar. The passage treats it as a deformity affecting suitability for public priestly service.