adjective
Definition: Having a shape that resembles an hourglass, which is wider in the middle and narrower at both ends.
Example: The dress had an hourglass silhouette that accentuated her curves.
noun
Definition: A device used to measure time, made of two glass parts connected by a narrow section, where sand or another material flows from the top to the bottom over a set period, usually one hour.
Example: The teacher used an hourglass to time the students during the exam.