<p><strong>Noun</strong></p><ul><li>Any of numerous tropical and subtropical American trees or shrubs belonging to the genus <em>Psidium</em>, of the myrtle family, especially <em>P. guajava</em>, bearing large, yellow, round to pear-shaped fruit, and <em>P. littorale</em>, bearing smaller, yellowish to deep-red, oval fruit.</li><li>The fruit, used for making jam, jelly, etc.</li></ul>