Definition of "haywire" in English

noun

1. Wire used to bind bales of hay.

adjective

1. Roughly-made, unsophisticated, decrepit (from the use of haywire for temporary repairs).

2. Behaviorally erratic or uncontrollable, especially of a machine or mechanical process.

   • It was working fine until it went haywire and wouldn't stop printing blank sheets.
   • Those kids go haywire when they don't get what they want.

verb

1. (transitive, rare) To attach or fix with haywire.