Dictionary and Thesaurus

Definition of Er

• (noun) a room in a hospital or clinic staffed and equipped to provide emergency care to persons requiring immediate medical treatment
• (noun) a trivalent metallic element of the rare earth group; occurs with yttrium

Synonyms of Er

• Erbium
• Er
• Atomic Number 68
• Emergency Room
• ER

Antonyms of Er

Homophones of Er