Definition of BLOCK

slangĀ  the upper or front part of the body that contains the brain, the major sense organs, and the mouth <threatened to knock the block off the jerk next door if he didn't can the noise>
Synonyms bean, block [slang], dome, mazard (or mazzard) [chiefly dialect], nob, noddle, noggin, noodle, nut [slang], pate, poll
Related Words cranium, crown, scalp, skull; occiput
a group of people acting together within a larger group <a more conservative block within the political party>
an association of persons, parties, or states for mutual assistance and protection <a block of oil-producing nations>

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