To be certain or precise in regard to a particular question; to have sufficient knowledge to answer or… transitive. With the question expressed by an…

transitive. to be perceived: to be aware of, that. Obsolete.

Knowledge as attained by observation or information; state of being aware of anything; perception, notice, observation. Esp. in to have cognizance of…

intransitive. To take notice; to observe or become aware of what is happening.

Of a person: To become lively, animated, or stirring; usually with up. Also, to become ‘alive’ to (a situation, etc.). Cf. wake, v. 7c.

to wake to: to become conscious or aware of; to become ‘alive’ to. Cf. awake, v. 3.

to take notice. spec. Of a baby: to show signs of interest in or curiosity about its surroundings.

figurative. To become mentally receptive to, or aware of; to comprehend. Const. as preceding sense.