i-adjective
bright and cheerful; clear and splendid
Describes a mood, expression, or atmosphere that is radiantly cheerful and unclouded, often used for a person's face or a festive occasion.
彼女の晴れ晴れしい笑顔を見ると、こちらまで嬉しくなる。
Seeing her bright and cheerful smile makes me happy too.
式場は晴れ晴
The ceremony hall was filled with a splendid and cheerful atmosphere.