A light, portable computer that is generally thinner than a laptop.(noun)
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 "notebook" in a sentence
"This extra heat is actually the reason why a lot of manufacturers push the term notebook over laptop - having two massively complex chips running all the time means that the form factor is not ideal to use on one's lap."
"Keeping the notebook is also (I think) spurring me to work more efficiently (I must have some progress to report each time!)."
"This notebook is the last DELL purchase I will ever choose to make or recommend to anyone who is even considering buying any DELL item."