business matters shouldn't be influenced by friendship or sentiment

Of businesses selling to other businesses.

Used other than figuratively or idiomatically: see in, the, business, of. / (idiomatic) dealing heavily in or intimately involved with (a practice, behavior, etc.)

plural of business

Of, to, pertaining to or utilized for purposes of conducting trade, commerce, governance, advocacy or other professional purposes. / Professional, businesslike, having concern for good business practice.

(countable) A specific commercial enterprise or establishment. / (countable) A person's occupation, work, or trade. / (uncountable) Commercial, industrial, or professional activity.

Engaged in business activity / (idiomatic) Ready to proceed in a desired activity.

Business aside from the main business. / Something secondary or subordinate.

(Los Angeles) Hollywood, the entertainment industry. / (slang) prostitution

plural of by-business