noun Download 🔗Share Someone who sleeps. Examples : "My little brother is a very deep sleeper. " person human Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share That which lies dormant, as a law. Examples : "The new student's quiet demeanor made her a sleeper in the debate club; her powerful arguments weren't apparent until the later rounds. " politics law government Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A spy, saboteur, or terrorist who lives unobtrusively in a community until activated by a prearranged signal; may be part of a sleeper cell. Examples : "For years, the friendly neighbor was just Mr. Henderson, but after receiving a coded message, he was revealed to be a sleeper activated to disrupt the city's power grid. " politics military person war group organization action police government nation Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A small starter earring, worn to prevent a piercing from closing. Examples : "My daughter lost her earring, so she wore a sleeper to keep her piercing open. " appearance wear body item Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A railway sleeping car. Examples : "We spent a night on an uncomfortable sleeper between Athens and Vienna." vehicle Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A sleeper hold. Examples : "The wrestler used a sleeper hold to subdue his opponent. " sport action body medicine Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share Something that achieves unexpected success after an interval of time. Examples : "A box-office bomb when it first came out, the film was a sleeper, becoming much more popular decades after being released." achievement business outcome Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A goby-like bottom-feeding freshwater fish of the family Odontobutidae. Examples : "The aquarium keeper carefully added a small sleeper fish to the community tank. " fish animal Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A nurse shark (family Ginglymostomatidae). Examples : "The marine biologist studied the sleeper shark in the aquarium. " fish animal Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A type of pajama for a person, especially a child, that covers the whole body, including the feet. Examples : "Aaron, Devin, and Laura looked so comfy in their sleepers." wear item family human Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share An automobile which has been internally modified to excess, while retaining a mostly stock appearance in order to fool opponents in a drag race, or to avoid the attention of the police. Examples : "The sleek, black car was a sleeper; it looked like a normal family sedan, but under the hood was a powerful engine. " vehicle race police technology sport machine Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A sedative. Examples : "The doctor prescribed a sleeper to help Mrs. Jones sleep through the night. " medicine Chat with AIVocabulary GamePractice Reading
verb Download 🔗Share To mark a calf by cutting its ear. Examples : "The rancher decided to sleeper the newly born calf so he could easily identify it later. " animal agriculture mark Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A railroad tie. Examples : "The train rumbled loudly as it passed over each sleeper beneath the tracks. " material building structure technical Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A structural beam in a floor running perpendicular to both the joists beneath and floorboards above. Examples : "The construction worker carefully positioned the sleeper on the joists before attaching the floorboards. " architecture building structure material Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A heavy floor timber in a ship's bottom. Examples : "The shipwright carefully inspected each sleeper in the hull to ensure the ship's structural integrity. " nautical part material building Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share The lowest, or bottom, tier of casks. Examples : "The warehouse workers carefully checked the sleeper, ensuring the stack of barrels wouldn't collapse. " nautical structure Chat with AIVocabulary GamePractice Reading