| Term | Definition |
| ○ linguistic competence | the hidden knowledge that can't be explained but is known to the speaker |
| ○ Linguistic performance | the way that they produce and comprehend language |
| Performance errors | the mispronunciation and jumbling of words in a sentence but which does not indicate stupidity |
| ○ Phonetics | a languages speech sounds |
| Phonology | how speech sounds work together in a language |
| ○ Morphology | the concept of breaking individual words down into smaller parts that have particular meaning or function |
| ○ Syntax | how words combine to form phrases and sentences |
| Semantics | the ability to determine the meaning of sentences |
| ○ Pragmatics | the ability to use context in order to interpret an utterances meaning |
| ○ Lexicon | the collection of all the words you know |
| ○ Grammar | The set of all elements and rules that make up a language |
| ○ Descriptive grammar | without judgment, the description of a language |
| ○ Prescriptive grammar | the way people prescribe how you should talk (the formal rules laid down by some entity or person, although it may not be based in the language's reality) |
| Semanticity | the property requiring that all signals in a communication system have a meaning or a function |
| ○ Interchangeability | denotes the ability of individuals to both transmit and receive messages |
| ○ Linguistic sign | the combination of a form and a meaning |
| ○ Sound symbolism | certain sounds occur in words not by virtue of being directly imitative of some sound - the sound of vowel {e} for small - petite, teeny, wee |
| ○ Discreetness | the property of language that allows us to combine together units in order to create large communicative units |
| ○ Duality of patterning | the fact that we can generate large number of meaningful elements from meaningless sounds (units) |
| Displacement | the ability of language to communicate about things, actions, ideas, and so on, that are not present (talking about color red even if you don't see it) |
| ○ Natural Language | a language that evolved naturally throughout history |
| ○ Constructed Language | one created by human, like Tolkien or modern Hebrew |