<p><strong>adjective</strong></p><ul><li>lasting but a moment;</li><li>very brief;</li><li>fleeting:<ul><li>a momentary glimpse.</li></ul></li><li>that might occur at any moment;</li><li>ever impending:<ul><li>to live in fear of momentary annihilation.</li></ul></li><li>effective or recurring at every moment;</li><li>constant.</li></ul>