You'll find it in most any complete dictionary that lists variants of root words, and it simply means two or more words or phrases that mean essentially the same thing. But, if you really want to understand
semantical in all of its forms an philosophical permutations, you will have to read
Logic, Meaning, and Conversation: Semantical Underdeterminacy, Implicature, and Their Interface
by Jay David Atlas.
The book focuses on the philosophy of language that deals with the connection between a theory of literal meaning and that of pragmatics, the distinction between the metaphorical and the literal, the formal semantics of natural language an the significant of conversational implicature with relation to inferences.
For example, when one says,
"Can you pass the salt?" it is literally a request for information about one's ability to pass salt.
Can you pass it, yes or no? But the implicature, that is to say the speaker's method of implying, suggesting or conveying a distinct meaning, as well as the natural inference, would be to mean that it is simply a request for salt.
Another example is at the Canadian border when a Canadian border guard asked me,
"Do you have your birth certificate with you?" Her conversational implicature failed to fully imply what she meant to convey, an instead was a simple yes/no request as to whether or not I had it. Thus, my answer was a simple,
"Yes." She then repeated her question, word for word, and I then repeated my answer, only this time with the addition of a redundant confirmation with the affirmative nod of the head.
She further complicated failed conversational implicature with her next question,
"Can I see it?" which is conversational semantics for,
"Am I able to see it?" another yes/no question which requires me to know the condition of her eyesight in order to formulate an adequate answer.However I did make that inference to mean,
"Would you please hand it to me so that I may closely inspect it?" So, I handed it to her an she seemed annoyed and pleased at the same time.
So you can see that you have to be careful about conversational implicature. You want to make sure you convey the meaning properly. Like, with,
"Some dogs are mammals," the speaker conveys by implicature that not all dogs are mammals, which is just silly. By the same token,
"Some van drivers are morons," implies that not all van rivers are morons, which is equally just a silly.
But back to semantical and POD money, since the overwhelming majority of loads that get picked up do actually get delivered, paying out POD money after the pickup or after the delivery ends up meaning the same thing, and differentiating between one or the other becomes an exercise in (meaningless) semantics. At what point between pickup and delivery the POD money is paid becomes semantical.
One could also argue that when the POD money gets paid out becomes a "Moo Point". You know, like, a cow's opinion. It doesn't matter. It's moooooo.
Of course, "Moo Point" and "Moot Point" are mere semantics, they mean the same thing. It's just that one has a little more eccentric flavor than the other. "Moot Points", on the other hand, are rare and valuable, depending on the context and the conversational implicature. It largely depends on whether they are made or awarded.