Definition of by eye
: by looking at something to get a rough idea of its size I measured the distance by eye.
Word by Word Definitions
: a specialized light-sensitive sensory structure of animals that in nearly all vertebrates, most arthropods, and some mollusks is the image-forming organ of sight
: the nearly spherical usually paired hollow organ of sight in vertebrates that is filled with a jellylike material, is lined with a photosensitive retina, and is lodged in a bony orbit in the skull
: all the visible structures within and surrounding the orbit and including eyelids, eyelashes, and eyebrows
: to fix the eyes on : look at
: contemplate, consider
: to watch or study closely
Seen and Heard
What made you want to look up by eye? Please tell us where you read or heard it (including the quote, if possible).