Body language cues are, in concept, the same as single words. Alone, they can mean a number of things. For example, crossed arms, can mean a person is cold, feeling unreceptive, low confidence or threatened. What will clarify the meaning of the crossed arms is the cluster of accompanying gestures. Much like the single word needs other words to help relay meaning. Think of the word “cool”. It can mean hip, describe a breeze, or a way of indicating things are ok (it’s cool, man). Putting the words together form a sentence, a complete thought. Look for the body language cues to form clusters, or sentences of their own for the most likely meaning of any single indicator.
Take a look at the following photos of people with their hands behind their heads. They all have obviously different meanings, based on the context.
In each of these photos, the arm gestures are the same but convey different meanings. The main thing to understand is that the meaning of each is supported by other indicators. This allows us to make sense of the gesture.