noun a container for receiving and keeping something.Please do not put anything that can be recycled in the trash receptacle. See the full entry
Wordsmyth
optional
adjective left to someone’s choice; not required.Sports are optional at my school. See the full entry
experimental
adjective of or related to a test or trial.the fields of experimental and clinical medicine. See the full entry
defensive
adjective intended for defense or protection, or serving to defend or protect.Defensive fortifications were built along the sea coast.Defensive measures were taken to protect the island from invasion. See the full entry
artifact
noun any object made by human beings, especially one of an earlier era.The museum had an exhibit of ancient Mexican artifacts. See the full entry