スリーパー

noun

sleeper; sleeping person

General term for a person who is sleeping, often used in contexts like identifying someone asleep on a train or in a shared space.

• 終しゅう電でんでスリーパーをよく見みかける。

  I often see sleepers on the last train.

noun

wearable blanket

Refers to a blanket-like garment that can be worn, popularized as a cozy loungewear item.

• 冬ふゆはスリーパーを着きてソファで過すごすのが好すきだ。

  In winter, I like to spend time on the sofa wearing a wearable blanket.

noun

sleeper agent

Espionage term for an agent who remains dormant in a target country until activated.

• そのスパイは長なが年ねんスリーパーとして潜せん伏ぷくしていた。

  The spy had been undercover as a sleeper agent for many years.

noun

sleeper (bowling)

In bowling, a pin hidden behind another pin, making it difficult to see and knock down.

• ボウリングでスリーパーを倒たおすのは難むずかしい。

  It's difficult to knock down a sleeper in bowling.