<p><strong>Noun</strong></p><ul><li>The short, thick, inner digit of the human hand, next to the forefinger.</li><li>The corresponding digit in other animals; pollex.</li><li>The part of a glove or mitten for containing this digit.</li><li>Architecture: An ovolo or echinus molding.</li></ul><p><strong>Verb</strong></p><ul><li>To soil or wear with the thumbs in handling, as the pages of a book.</li><li>To glance through (the pages of a book, leaflet, etc.) quickly.</li><li>To play (a guitar or other instrument) with or as with the thumbs.</li><li>(Of a hitchhiker) To solicit or get (a ride) by pointing the thumb in the desired direction of travel.</li></ul>