Ch is both a word and an abbreviation. In measurements, ch means "chain," which is a measurement of 22 yards. Engineers use it in their calculations too. Other ch definitions include the abbreviation for "check" in chess and an abbreviation for courthouse.In the Bible, CH stands for either of the Books of Chronicles. Other ch meanings involve other short versions for words like chapter, chaplain, and chief. "The fire ch arrive at the blaze," is a good example. In Old English, it meant "I," and the Germans turned that into the modern "ich." The Dutch use the guttural "ik" instead.