<p><strong>Adverb</strong></p><ul><li>toward or in the higher part of a stream</li><li>against the current</li></ul><p><strong>Adjective</strong></p><ul><li>directed upstream</li><li>situated upstream</li><li>of or relating to the early stages in the operations of a business or industry</li></ul><p><strong>Noun</strong></p><ul><li>not applicable</li></ul><p><strong>Verb</strong></p><ul><li>not applicable</li></ul><p><strong>Pronoun</strong></p><ul><li>not applicable</li></ul><p><strong>Preposition</strong></p><ul><li>not applicable</li></ul><p><strong>Conjunction</strong></p><ul><li>not applicable</li></ul><p><strong>Interjection</strong></p><ul><li>not applicable</li></ul>