adj. vagu·er, vagu·est
1. Not clear in meaning or expression; inexplicit. See Synonyms at ambiguous.
2. Not thinking or expressing oneself clearly: "Most of us are quite vague about the theoretical underpinnings of the medical theories that guide our doctors" (Kwame Anthony Appiah).
3. Lacking definite shape, form, or character; indistinct: saw a vague outline of a building through the fog.
4. Indistinctly felt, perceived, understood, or recalled; hazy: a vague uneasiness.
[French, from Old French, wandering, from Latin vagus.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.