Definition: a liquid is one of the states of matter. The particles in a liquid are free to flow, so while a liquid has a definite volume, it does not have a definite shape.
Examples: at room temperature: water, mercury, vegetable oil, ethanol
By Anne Marie Helmenstine, Ph.D., About.com Guide
Mercury is a heavy silvery metal that is liquid at room temperature.
Femto/Elementbox04, wikipedia.org