Hourglass (meaning, definition)

An hourglass is a glass with 2 bulbs on the end and a narrowing in the middle where the sand needs to go through. The package of sand that needs to go through the narrowing is mostly equal to 1 hour if all the sand has be flown into one bulb.

Tramp (meaning, definition)

A tramp is an old glas object to measure the time. Sometimes it's called an hourglass.