1. a person who shares a bed with another
2. a person or group closely associated with another, especially in an unlikely or temporary alliance
Usage: often used in the phrase ‘strange bedfellows’

Examples

• The two children were bedfellows during their sleepover.
• Politics makes strange bedfellows of former enemies.
• The environmental group found an unlikely bedfellow in the conservative senator.
• Business and charity organizations became bedfellows for the fundraising campaign.
• The siblings were reluctant bedfellows when sharing a hotel room.
• Economic necessity created bedfellows of competing companies.