<p><strong>Adverb</strong></p><ul><li>On the day preceding this day.</li><li>A short time ago: Yesterday your money went further.</li></ul><p><strong>Noun</strong></p><ul><li>The day preceding this day.</li><li>Time in the immediate past.</li></ul><p><strong>Adjective</strong></p><ul><li>Belonging or pertaining to the day before or to a time in the immediate past: Yesterday morning.</li></ul>