emptiness or hollowness; a vacant state physically or emotionally.
長い一人暮らしで心が空虚に感じることがある。
Sometimes I feel empty inside after living alone for a long time.
成功してもどこか空虚さが残っていた。
Even after success, a sense of emptiness remained.
空虚な表情を浮かべている。
He/She has an empty expression on their face.
inanity or pointlessness; a lack of meaningful content.
派手な演出だけで中身が空虚な番組だった。
It was a program full of flashy production but empty in substance.
彼の話は理屈はあるがどこか空虚に聞こえる。
His speech has logic but somehow sounds hollow.
虚栄心で繕った生活は結局空虚だ。
A life patched together by vanity is ultimately empty.