Definitions

1. adjective

not at or near a terminal, especially a railway station, bus stop, or other place of arrival or departure

“The abterminal platform was empty, awaiting the late train.”

2. noun

a station or place not at the end of a line, but near the beginning or in the middle, especially a railway station or bus stop

“The abterminal station had limited facilities, but it was still a necessary stop.”