Definition of by eye
- I measured the distance by eye.
: 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
: all the visible structures within and surrounding the orbit and including eyelids, eyelashes, and eyebrows
: the faculty of seeing with eyes
: to fix the eyes on : look at
: contemplate, consider
: to watch or study closely
What made you want to look up by eye? Please tell us where you read or heard it (including the quote, if possible).