Fit for use; convenient to use: usable spare parts. (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 "usable" in a sentence
"Print the web page by either clicking on File, Print or pressing control p. The final step is making the label usable for your needs."
"An officer also found what they called a usable amount of cocaine in her car."
"Police also found a small amount of what they called usable amount of cocaine in her car."