A noun is a word that represents the name of a specific object or set of objects, such as living creatures, places, actions, qualities, states of existence, or ideas.
Example:
- Book (object)
- Cat (animal)
- Christopher (person)
- Fairness (quality/idea)
- England (place)
All Spanish nouns have gender, either masculine (male) or feminine (female).
(There is also the neutral which will be explained in another article.)
Example :
Book – Libro (m) = El libro      Window – Ventana (f)  = La ventana
In dictionaries, the gender of a noun is generally indicated as (m) for masculine and (f) for feminine.