1. (uncountable) The backs of camels.

- We travelled across the desert on camelback.

2. (countable) A flexible water container worn on the back.

- An empty camelback is a blessing and a curse: it is easy to carry, but it means you have no water.

3. (countable) A house with a second storey that does not completely cover the ground floor.

- My friend lived in a camelback; we used to have fun climbing out of the window onto the roof below.

4. (countable) A railway locomotive that has its cab in the middle as opposed to at the end.

- The camelbacks were designed to help with the visibility problems inherent in putting the driver behind the entire engine.

5. (countable) A camelback sofa or chair.

- He fell back relieved into his favourite camelback with a gin and tonic.

6. (uncountable) A type of rubber used in tyre restoration.

- We require four million tons of camelback each year.

- The camelback rubber produced in this plant is shipped around the world.