ＯＰ

noun

opening credits; title sequence

Refers to the opening credits or title sequence of a TV show, anime, or film. Often read as オープニング in speech.

• このアニメのＯＰは映えい像ぞうがとてもきれいだ。

  The opening credits of this anime have really beautiful visuals.

noun

opening theme song

Specifically the theme song played during the opening credits. Compare with 主題歌, which can be any theme song.

See also: 主題歌

• 新あたらしいＯＰは人にん気きバンドが担たん当とうしている。

  The new opening theme song is performed by a popular band.

noun

overprint

Rare technical term for overprinting in printing or philately. Not commonly encountered outside specialized contexts.

• この切きっ手てにはＯＰが施ほどこされている。

  This stamp has an overprint applied.