a block having two sheaves or pulleys.
double rainbowRead more in this article about some frequently asked questions and fun facts related to our definitions.
Don’t Get Into Double Trouble With Double NegativesWhat’s a double negative? A double negative is when two negative words or constructions are used within a single clause. Sentences with double negatives are not grammatically correct . . . and they’re confusing. That’s because double negatives cancel each other out and make a positive. So, when you use a double negative it ends up being the exact opposite of what you mean. You’ll …
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for double block
An iron thimble, large enough to hook the double-block of a side or train tackle, is spliced into the end of each purchase-fall.Ordnance Instructions for the United States Navy.|Bureau of Ordnance, USN