A flight or trajectory that reaches to Earth`s upper atmosphere or the edge of space but does not involve the completion of an orbit. The first American manned flight into space, by Alan Shepard in May 1961, was suborbital. Found on http://www.daviddarling.info/encyclopedia/S/suborbital.html
suborbital 1. A reference to a spacecraft: not in orbit; not achieving an altitude and velocity resulting in a ballistic trajectory circling the earth at least once. 2. Having or following a trajectory of less than one orbit; as a rocket or spacecraft. 3. In anatomy, situated below the orbit of the eye. 4. A suborbital part; such as, a bone, ner... Found on http://www.wordinfo.info/words/index/info/view_unit/1499/2
(of a spacecraft) not in orbit; not achieving an altitude and velocity resulting in a ballistic trajectory circling the earth at least once. · situated below the orbit of the eye. Found on https://www.infoplease.com/dictionary/suborbital