grin 2022.12.06 grinとは 意味・定義・例文 Noun 名詞 1. act of grinning にこにこ笑うこと, にやっと笑うこと With a nasty grin on his face, he stuck out his foot to trip her. Verb 動詞 1. smile widely; smile from ear to ear にこっと笑う, 大口をあけて馬鹿みたいに笑う She grinned with delight.