facial hair such as a moustache, beard, or sideburns. Different kanji may specify types, but in daily use it's usually written in kana or katakana.
彼は顎にひげを生やしている。
He has a beard on his chin.
父は口ひげをきれいに整えている。
My father keeps his moustache neatly trimmed.
その俳優は映画のためにひげを伸ばした。
The actor grew a beard for the movie.
whiskers on animals (e.g., a cat's whiskers) or sensory feelers on insects — sensory hairs.
猫のひげは狭い所を通るときに役に立つ。
A cat's whiskers help when it passes through narrow spaces.
昆虫は触角やひげで周囲を探る。
Insects explore their surroundings with antennae and feelers.
in finance, the 'wick' or shadow on a candlestick chart (showing price extremes) — usually written in katakana as 'ヒゲ'.
このローソク足の上ヒゲは売り圧力の強さを示している。
The upper wick on this candlestick indicates strong selling pressure.
下ヒゲが長いと買い支えが入ったことが分かる。
A long lower wick shows that buying support came in.