A pillow or bolster used to rest one's head while sleeping.
新しい枕に替えたら、首の痛みが減った。
After changing to a new pillow, my neck pain decreased.
旅行用の小さな枕をバッグに入れておくと便利だ。
It's handy to keep a small travel pillow in your bag.
その店は低反発の枕が人気だ。
That shop's memory-foam pillows are popular.
An introduction or lead-in (e.g., to a rakugo story); an opening that sets up the main topic.
落語の枕で観客の心をつかんだ。
He captured the audience with the opening of his rakugo story.
プレゼンの枕として簡単な自己紹介を入れた。
I included a brief self-introduction as the lead-in to my presentation.