People who prefer to be alone and don't socialize much with others, or animals that live solitary lives.
From 'lone' (solitary) plus the agent suffix -er, creating 'loner' for a person who is alone, then -s for plural.
Some of the most creative people in history were loners—Franz Kafka, Nikola Tesla, and Emily Dickinson all worked best in solitude, challenging the idea that isolation is always negative!
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