<p><strong>Noun</strong></p><ul><li>a cardinal number, ten plus one.</li><li>a symbol for this number, such as 11 or XI.</li><li>a set or group of 11 people or things, such as a football or soccer team.</li><li>none elevens or 11s.</li><li>Also called eleven lines.</li><li>Informal: a pair of vertical wrinkles that commonly develop between the eyebrows; frown lines.</li></ul><p><strong>Adjective</strong></p><ul><li>amounting to one more than ten in number.</li></ul>