GRE shack Definition A small, poorly built cabin or house. Example "They spent the weekend fishing from a wooden shack by the lake." Sign in to save GRE PDF — $25 ← shabby shackle → Related words GRE awe GRE smithereens GRE abacus SAT abase GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate SAT abdomen GRE abduct GRE aberrant