Definition
To ignore or avoid unpleasant realities or problems, often with the intent to evade responsibility or discomfort.
Faced with financial difficulties, he chose to bury his head in the sand, refusing to seek help.
She knew the report deadline was approaching, but she acted like she had her head in the sand, pretending it wasn't happening.
The company manager knew that sales were declining, but he buried his head in the sand and refused to take any action.