a alert and awake; not sleeping or comatose
b aware of one's surroundings, one's own thoughts and motivations, etc.
a aware of and giving value or emphasis to a particular fact or phenomenon
I am conscious of your great kindness to me
b (in combination)
3 done with full awareness; deliberate
a conscious effort, conscious rudeness
a 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
b (as n.) the conscious is only a small part of the mind (Compare)
unconscious (C17: from Latin conscius sharing knowledge, from com- with + scire to know)
adj aware of belonging to a particular social rank or grade, esp. in being hostile or proud because of class distinctions
1 unduly aware of oneself as the object of the attention of others; embarrassed
2 conscious of one's existence
English Collins Dictionary - English Definition & Thesaurus
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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"