When a word is defined, it helps people connect, relate, or link it to what the word is supposed to mean. Without a meaning, a word is irrelevant. There is no reason to even use the word without a definition.
Most of the time, I try to use words that I know the meaning of. I prefer communication by internet so that I can check my dictionary software for a quick definition of the words other people use when they comment on my blog or Youtube channel.
Remember, I am slow with words, but the fact that I learn slowly helps me learn at a deeper level. I often like to ask people how they define a word. I know that people are not always using the word based on what a dictionary says.