Going or acting without companions or a companion: unaccompanied children on a flight. (adjective)
Music Performed or scored without accompaniment.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "unaccompanied" in a sentence
""The principle of the attack — a device placed in unaccompanied baggage — was not," she said, saying it bore "resemblance" to the attack on Pan Am 103."
"Most major airlines run programs for these junior jet-setters, known as "unaccompanied minors," to ensure they get from A to B with the minimum of worry and potential for mishap."
"Nobody could play any instruments so we sang unaccompanied, which is fine but there were usually only three or four of us and two of those can't hold a tune a lot of the time, nor feel any rhythm to a song."