However, I can explain some concepts that might be related to what you're looking for:
1. Noun Phrases: A noun phrase is a group of words that acts as a noun. It typically includes a noun as its head and may have modifiers like adjectives, adverbs, or other phrases.
Examples:
* The big red ball
* That beautiful, old house
* The woman with the blue hat
2. Noun Markers: In some languages, there are specific words or grammatical features that mark a word as a noun. These are called "noun markers."
Example:
* In Japanese, the particle "が" (ga) can be used to mark the subject of a sentence, which is often a noun.
3. Context Clues: When reading, you can often figure out what words are nouns based on their position in a sentence, the words surrounding them, and the overall meaning of the text. These are called "context clues."
4. Noun Functions: Nouns have specific roles in a sentence:
* Subject: The noun performing the action.
* Object: The noun receiving the action.
* Complement: A noun that completes the meaning of a verb or adjective.
* Modifier: A noun that modifies another noun.
To understand what "noun signals" might mean in your context, please provide more information. For example:
* Where did you encounter this term? (A textbook, a lecture, a website, etc.)
* What was the context of the term's usage?
* What other concepts were discussed along with "noun signals"?
With more context, I can give you a more specific and helpful answer.