A farewell expression said to someone leaving (often from home), meaning 'take care' or 'have a good day.' Commonly used in response to '行ってきます'.
母が玄関で私に「いってらっしゃい」と手を振った。
My mother waved at me at the door and said, 'Have a good day.'
「行ってきます」「いってらっしゃい、気をつけてね」。
'I'm off.' — 'Take care, see you.'
仕事に行く夫に子どもが『いってらっしゃい』と叫んだ。
The child shouted 'Have a good day!' to the husband going to work.