1

mildew

noun mil·dew \ ˈmil-ˌdü , -ˌdyü \
Updated on: 28 Nov 2017

Definition of mildew

1 a : a superficial usually whitish growth produced especially on organic matter or living plants by fungi (as of the families Erysiphaceae and Peronosporaceae)
b : a fungus producing mildew
2 : a discoloration caused by fungi

mildewy

play \\ adjective

Examples of mildew in a Sentence

  1. The basement's damp walls were covered with mildew.

Recent Examples of mildew from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mildew.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of mildew

Middle English, from Old English meledēaw honeydew; akin to Old High German militou honeydew


2

mildew

verb

Definition of mildew

transitive verb
: to affect with or as if with mildew
intransitive verb
: to become affected with mildew

Recent Examples of mildew from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mildew.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of mildew

1552


MILDEW Defined for English Language Learners

mildew

noun

Definition of mildew for English Language Learners

  • : a usually white substance that grows on the surface of things in wet, warm conditions


MILDEW Defined for Kids

1

mildew

noun mil·dew \ ˈmil-ˌdü , -ˌdyü \

Definition of mildew for Students

1 : a thin whitish growth produced by a fungus especially on decaying material or on living plants
2 : a fungus producing mildew

2

mildew

verb

Definition of mildew for Students

mildewed; mildewing
: to become affected with mildew

Medical Dictionary

mildew

noun mil·dew \ ˈmil-ˌd(y)ü \

medical Definition of mildew

1 : a superficial usually whitish growth produced especially on organic matter or living plants by fungi (as of the families Erysiphaceae and Peronosporaceae)
2 : a fungus producing mildew


Seen and Heard

What made you want to look up mildew? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to provide what is needed to exist

Get Word of the Day daily email!

Test Your Vocabulary

Intact Latin Quiz

  • roman-tablet
  • What did focus mean in Latin?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Add Diction

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!