To detect with the senses, especially with the eyes.
To distinguish something as being different from something else; to differentiate.
To perceive, recognize, or comprehend with the mind; to descry.
To perceive differences.
To find out or observe (someone or something, especially if not easy to see) by spying or looking; to catch sight of; to see; to spot.
To see (someone or something) without foreplanning or unexpectedly.