<p><strong>Noun</strong></p><ul><li>a narrow entrance or passageway</li><li>a place or stage in a process at which progress is impeded</li><li>a method of guitar playing that produces a gliding sound by pressing a metal bar or glass tube against the strings</li></ul><p><strong>Verb</strong></p><ul><li>to hamper or confine by or as if by a bottleneck (used with object)</li><li>to become hindered by or as if by a bottleneck (used without object)</li></ul>