1. the act of making copies

e.g. Gutenberg's reproduction of holy texts was far more efficient

Synonym: reproduction

2. the repetition of an experiment in order to test the validity of its conclusion

e.g. scientists will not believe an experimental result until they have seen at least one replication

3. copy that is not the original
something that has been copied

Synonym: replicareproduction

4. the repetition of a sound resulting from reflection of the sound waves

e.g. she could hear echoes of her own footsteps

Synonym: echoreverberationsound reflection

5. (law) a pleading made by a plaintiff in reply to the defendant's plea or answer

6. a quick reply to a question or remark (especially a witty or critical one)

e.g. it brought a sharp rejoinder from the teacher

Synonym: rejoinderretortreturnripostecomebackcounter

7. (genetics) the process whereby DNA makes a copy of itself before cell division