<p><strong>Noun:</strong></p><ul><li>Phonetics, Orthography: A diacritic (~) placed over an n, as in Spanish mañana, to indicate a palatal nasal sound or over a vowel, as in Portuguese são, to indicate nasalization.</li><li>Swung dash.</li><li>Mathematics: A symbol (∼) indicating equivalency or similarity between two values.</li><li>Logic: A similar symbol indicating negation.</li></ul>