2. Noun. (nautical) The part of a vessel abaft midships. ¹
3. Noun. (astronomy) A companion body that trails a satellite or spacecraft. ¹
4. Noun. (astronautics) A section or piece of a launch vehicle, rocket, or spacecraft that enters the atmosphere unprotected behind the nose cone or other body that is protected for entry. ¹
¹ Source: wiktionary.com