1. Not reflecting personal feelings. For example, many people would regard the relative formality of a word-processed letter as connoting impersonality by comparison with an otherwise identical handwritten one.
2. Unconcerned with the feelings of individuals.
3. (linguistics) A formal use of language which avoids the personal mode (and personal pronouns), as in ‘Smoking is not permitted’—a passive form with the agent deleted. Such usage is common in legal documents, public notices, and other similar registers.