What are Macbook Charge Cycles?

A charge cycle is defined as 1 full discharge and 1 full recharge. It is defined in the UN Manual of Tests and Criteria, Subsection 38.3:

Cycle means one sequence of fully charging and fully discharging a rechargeable cell or battery.

This means that if you only discharge your battery 20% and recharge it, you would have do to it 5 times to be a full cycle. A 50% drain and recharge would have to happen twice to be considered a cycle. And so on.

So in reference to your question, unless your battery fully drained, you didn't go through a cycle.