1. large piles of hay that have been cut, dried, and stored outdoors

Examples

• The farmer built several haystacks in the field after harvesting.
• Children love to jump into soft haystacks during autumn.
• The old barn was surrounded by tall haystacks covered with tarps.
• Finding a needle in a haystack means searching for something very difficult to locate.
• The haystacks dotted the countryside like golden pyramids.
• Workers used pitchforks to build the haystacks higher.
• Rain threatened to spoil the haystacks left uncovered overnight.