A noun is a word that names a person, animal, place, thing, idea, or concept.
Persons: girl, boy, instructor, student, Mr. Smith, Peter, president
Animals: dog, cat, shark, hamster, fish, bear, flea
Places: gym, store, school, Lake Minnetonka, Minnesota, village, Europe
Things: computer, pen, notebook, mailbox, bush, tree, cornflakes
Ideas: liberty, panic, attention, knowledge, compassion, worship
There are different types of nouns. It is not important to remember the names of the different types of nouns. It is important to know that the words in the lessons are all nouns.
ESL Desk http://www.esldesk.com/grammar/nouns