1. (adjective) lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed)

• subterranean
• subterraneous

2. (adjective) coming at a subsequent time or stage

• later
• posterior

1. (adjective) lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed)

• covert

2. (adjective) beyond or outside an area of immediate interest; remote

• distant
• remote

3. (adjective) coming at a subsequent time or stage

• subsequent