What is meant by gender in nouns?

Answer:
Gender nouns are words that tell you what the person or animal is but also what gender that person or animal is. Example:

Parents, neutral
Father, masculine gender
Mother, feminine gender

Chicken, neutral
Rooster, masculine
Hen, feminine

Pilot, neutral
aviator, masculine
aviatrix, feminine

Cattle, neutral
Bull, masculine
Cow, feminine