noun
narrow eyes; half-open eyes
Describes eyes that are narrowed, squinting, or not fully open. Often used with verbs like する or になる.
彼は眩しそうに細目をした。
He narrowed his eyes as if the light were too bright.
猫が気持ちよさそうに細目になっている。
The cat has its eyes half-closed, looking comfortable.
noun
fine mesh; fine texture; tight weave
Refers to a fine or dense structure, such as a sieve, fabric, or file. The gloss 'smooth cut (of a file)' is a technical use.
この網は細目で、小さな虫も逃がさない。
This net has a fine mesh, so even small insects can't escape.
細目のやすりで仕上げをする。
Finish it with a smooth-cut file.