any of numerous very small to minute arachnids often infesting animals or plants or stored foods
"The old pantry was overrun by a mite that had turned our dried beans into dust."
Any of many minute arachnids which, along with the ticks, comprise subclass Acarina (aka Acari).
"After noticing a tiny red bump on my leg that didn't go away, I suspected it was caused by a mite rather than a mosquito bite."
Eye dialect spelling of might.
"I could have sworn that old mite saw me hide his keys."