1. giving shelter or refuge to someone, especially someone in hiding or wanted by authorities
Usage: often used in legal or formal contexts
2. holding or keeping a feeling, thought, or grudge in one's mind
Usage: commonly used with negative emotions
3. providing a place of safety or refuge for a ship or vessel
Usage: nautical

Examples

• The family was accused of harbouring a fugitive in their basement.
• She has been harbouring resentment toward her former colleague for years.
• The port is harbouring several fishing vessels during the storm.
• He was harbouring doubts about whether to accept the job offer.
• The organization was charged with harbouring illegal immigrants.
• They are harbouring hopes that the situation will improve soon.