1. Capable of being dissolved, especially easily dissolved: soluble fats.
2. Possible to solve or explain: soluble mysteries.
[Middle English, from Old French, from Late Latin solūbilis, from Latin solvere, to loosen; see leu- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.