1. (noun) a surface on which an organism grows or is attached

• substrate

2. (noun) any stratum or layer lying underneath another

• substrate

3. (noun) an indigenous language that contributes features to the language of an invading people who impose their language on the indigenous population

• substrate

1. (noun) a surface on which an organism grows or is attached

• surface

2. (noun) any stratum or layer lying underneath another

• stratum

3. (noun) an indigenous language that contributes features to the language of an invading people who impose their language on the indigenous population

• indigenous language