simple past tense and past participle of busy

Of businesses selling to other businesses.

business matters shouldn't be influenced by friendship or sentiment

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

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.

(transitive) To make somebody busy or active; to occupy. / (transitive) To rush somebody.

Crowded with business or activities; having a great deal going on. / Engaged in activity or by someone else. / Having a lot going on; complicated or intricate. / Officious; meddling.

(slang, UK, Liverpudlian, derogatory) A police officer.

plural of business

busyness; making oneself busy with something