This is gluten-free bread.

this Determiner

— You use this to show which thing or idea you are talking about. You use it when the thing or idea is close to you. This trip was a great idea. Which book is yours, this one or that one? — The known thing. This man went to the door.

this Demonstrative Determiner

— The thing indicated. This is my hand.

is Verb

— A form of the verb be when talking about someone or something else. He is late for class. Is it hot in here?

gluten

— noun a protein substance that remains when starch is removed from cereal grains; gives cohesiveness to dough

free Adjective

— If something is free, it does not cost money to buy. This loaf of bread is free. It costs $0. The government provides free healthcare for people who cannot afford it. — If something is free, it is able to go (move) anywhere easily. A wild bird is free to go where it likes. — If something is free, it is not blocked. The drain was free of anything blocking it. — If something or someone is free, it is not in use. This chair does not have anyone sitting in it. It is free. — When something is free, it has no conditions or limitations to using or being in it. This is a free country. You can have your own freedom of speech here.

free Verb

— If you free something or someone, you release it. She frees the birds because they do not belong in a cage. We officially free you from jail. You may go.

bread Noun

— Bread is food made from mixing flour, water, and yeast.refYeast is not always used to make bread. When yeast is not used, the bread is called unleavened bread./ref Small children love eating bread and butter.