Safety curtain and Theatre curtain

Safety curtain noun - A fireproof theater curtain to be dropped in case of fire.

Theatre curtain and safety curtain are semantically related. In some cases you can use "Theatre curtain" instead a noun phrase "Safety curtain".

Theatre curtain noun - A hanging cloth that conceals the stage from the view of the audience; rises or parts at the beginning and descends or closes between acts and at the end of a performance.

Safety curtain and theatre curtain are semantically related. Sometimes you can replace phrase "Safety curtain" with "Theatre curtain", this phrases are similar.