What I did understand from juxtaposition was just about the contrast. It means that two objects or two things when has a contrast it will be juxtaposition. For example juxtaposition in the conversation is:”Today is raining but I won’t pick the umbrella”. It means that in juxtaposition it will have a contrast but it will stick together the meaning and the content of what we use (raining and umbrella).
So juxtaposition is kind of contrast with matching the word’s content

.