Difficult to handle because of weight or bulk. See Synonyms at heavy.(adjective)
Troublesome or onerous.(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 "cumbersome" in a sentence
"That results in cumbersome procedures for many passengers."
"It also seems to me that on the core amnesty point, what the negotiators came up with was simultaneously unduly cumbersome from a humanitarian point of view while also not in any way appeasing restrictionist concerns."
"In this “liberalised” regime why create, innovate and trade in cumbersome goods when one can make far more far quickly and with far less risk just by moving money (data) and money instruments between computers around the world?"