Repelling, tending not to combine with, or incapable of dissolving in water.(adjective)
Of or exhibiting hydrophobia.(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 "hydrophobic" in a sentence
"Both are classified as hydrophobic, and fabrics made of them tend to feel uncomfortable in hot, humid weather."
"The other end of the same molecule is hydrophobic, meaning it doesn't like water, and this end is actually able to dissolve grease molecules."
"In humid tropical areas, or areas with heavy rainfall, it may be advisable to purchase "hydrophobic" cement, since this kind of cement can be stored in damp conditions for long periods of time."