porous

adjective po·rous \ ˈpȯr-əs \
Updated on: 7 Dec 2017

Definition of porous

1 a : possessing or full of pores
b : containing vessels
  • hardwood is porous
2 a : permeable to fluids
b : permeable to outside influences
3 : capable of being penetrated
  • porous national boundaries

porously

adverb

porousness

noun

Examples of porous in a Sentence

  1. The country has a porous border.

  2. a cleaner that should not be used on porous surfaces

Recent Examples of porous from the Web

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

First Known Use of porous

14th century


POROUS Defined for English Language Learners

porous

adjective

Definition of porous for English Language Learners

  • : having small holes that allow air or liquid to pass through

  • : easy to pass or get through


POROUS Defined for Kids

porous

adjective po·rous \ ˈpȯr-əs \

Definition of porous for Students

1 : full of small holes
  • porous wood
2 : capable of absorbing liquids
  • porous paper

Medical Dictionary

porous

adjective po·rous \ ˈpōr-əs, ˈpȯr- \

medical Definition of porous

1 : possessing or full of pores
  • porous bones
2 : permeable to fluids


Seen and Heard

What made you want to look up porous? 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

the significant part of a grievance

Get Word of the Day daily email!

Test Your Vocabulary

Star Wars Words Quiz

  • cu-jedi-training
  • The bounty portion of bounty hunters (such as Boba Fett) comes from a Latin word meaning
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

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!