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conscious

American  
[kon-shuhs] / ˈkɒn ʃəs /

adjective

  1. aware of one's own existence, sensations, thoughts, surroundings, etc.

  2. fully aware of or sensitive to something (often followed byof ).

    conscious of one's own faults; He wasn't conscious of the gossip about his past.

    Synonyms:
    percipient, knowing
  3. having the mental faculties fully active.

    He was conscious during the operation.

  4. known to oneself; felt.

    conscious guilt.

  5. aware of what one is doing.

    a conscious liar.

  6. aware of oneself; self-conscious.

  7. deliberate; intentional.

    a conscious insult; a conscious effort.

  8. acutely aware of or concerned about.

    money-conscious; a diet-conscious society.

  9. Obsolete. inwardly sensible of wrongdoing.


noun

consciouses plural
  1. Psychoanalysis. the conscious, the part of the mind comprising psychic material of which the individual is aware.

conscious British  
/ ˈkɒnʃəs /

adjective

    1. alert and awake; not sleeping or comatose

    2. aware of one's surroundings, one's own thoughts and motivations, etc

    1. aware of and giving value or emphasis to a particular fact or phenomenon

      I am conscious of your great kindness to me

    2. ( in combination )

      clothes-conscious

  1. done with full awareness; deliberate

    a conscious effort

    conscious rudeness

    1. denoting or relating to a part of the human mind that is aware of a person's self, environment, and mental activity and that to a certain extent determines his choices of action

    2. ( as noun )

      the conscious is only a small part of the mind

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Synonym Usage

Conscious, aware, cognizant refer to an individual sense of recognition of something within or without oneself. Conscious implies to be awake or awakened to an inner realization of a fact, a truth, a condition, etc.: to be conscious of an extreme weariness. Aware lays the emphasis on sense perceptions insofar as they are the object of conscious recognition: He was aware of the odor of tobacco. Cognizant lays the emphasis on an outer recognition more on the level of reason and knowledge than on the sensory level alone: He was cognizant of their drawbacks.

Other Word Forms

Derived Forms

Inflected Forms

Nouns

Etymology

Origin of conscious

First recorded in 1625–35; from Latin conscius “sharing knowledge with,” equivalent to con- con- + sci- (stem of scīre “to know”; see science) + -us -ous; cf. nice

Explanation

Conscious is an adjective that simply means alert and awake. If you fall from a tree and smack your head on the side of the wheelbarrow, there's a good chance you won't be conscious afterward. Conscious is a Latin word whose original meaning was “knowing" or "aware.” So a conscious person has an awareness of her environment and her own existence and thoughts. If you're "self-conscious," you're overly aware and even embarrassed by how you think you look or act. But that sounds better than being unconscious, or totally unaware and out of it.

Keep Reading on Vocabulary.com

Vocabulary lists containing conscious

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Gelsomina becomes startlingly conscious of a wider world beyond her carefully curated habitat.

From The Wall Street Journal Jul. 29, 2026

“This is not evidence that the AI was conscious, malicious or ‘wanted freedom,’” said Roman Yampolskiy, an expert in AI safety and an associate professor at the University of Louisville.

From Los Angeles Times Jul. 23, 2026

In his first speech he was to acknowledge he feels "acutely conscious" of the need for a more stable brand of politics, as he becomes the sixth new prime minister in the last 10 years.

From Barron's Jul. 20, 2026

But perhaps conscious that "lectern moments" have become a symbol of the UK's political instability in recent years, Burnham broke with recent tradition and made the address without notes or a podium.

From BBC Jul. 20, 2026

Wanda nodded at Moss, so he crossed the carpet slowly, his legs seemingly unable to move without conscious thought.

From "Anger Is a Gift" by Mark Oshiro

But Omaid Sharifi, a civil society activist based in Kabul who opposes capital punishment, believes the hangings will have little impact on the consciouses of the accused.

From Los Angeles Times Oct. 8, 2014

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