Meaningful

In linguistics, meaning is the information or concepts that a sender intends to convey, or does convey, in communication with a receiver.

Ambiguity means confusion about what is conveyed, since the current context may lead to different interpretations of meaning. Many words in many languages have multiple definitions. Ambiguity is an effect of a rupture of the rule of identity in the context of the exchange of information. Particularly the sender may be physically absent, and the contexts explicitly divergent, such as will be the case when the receptor is a reader and the sender was a writer.

Pragmatics is the study of how context affects meaning. The two primary forms of context important to pragmatics are linguistic context and situation context.

Linguistic context is how meaning is understood without relying on intent and assumptions. In applied pragmatics, for example, meaning is formed through sensory experiences, even though sensory stimulus cannot be easily articulated in language or signs. Pragmatics, then, reveals that meaning is both something affected by and affecting the world. Meaning is something contextual with respect to language and the world, and is also something active toward other meanings and the world. Linguistic context becomes important when looking at particular linguistic problems such as that of pronouns.

Situation context refers to every non-linguistic factor that affects the meaning of a phrase. An example of situation context can be seen in the phrase "it's cold in here", which can either be a simple statement of fact or a request to turn up the heat, depending on, among other things, whether or not it is believed to be in the listener's power to affect the temperature.

Semantics is the study of how meaning is conveyed through signs and language. Understanding how facial expressions, body language, and tone affect meaning, and how words, phrases, sentences, and punctuation relate to meaning are examples. Various subgroups of semantics are studied within the fields of linguistics, logic and computing. For example, linguistic semantics includes the history of how words have been used in the past; logical semantics includes how people mean and refer in terms of likely intent and assumptions.

...
Wikipedia