1) British snack break 2) Mid-morning snack 3) The refreshments taken 
In the British Isles, elevenses (z) is a snack that is similar to afternoon tea, but eaten in the morning. It is generally less savoury than brunch, and might consist of some cake or biscuits with a cup of coffee or tea. The name refers to the time of day that it is taken: around 11 am. In the Royal Australian Navy, elevenses is commonly called mo...
Elevenses is British slang for mid-morning refreshments.
a midmorning break for refreshments. · the refreshments taken.