lubrication /ˌluː.bɹɪˈkeɪ.ʃən/noun 1forms 1phrases 1 noun1 •The application of a substance (lubricant) between moving surfaces in contact in order to reduce friction and minimize heating.Valve and cylinder lubrication is by atomised oil delivered by mechanical lubricators. — 1951 formslubrications Phrases with lubrication lubrication paymentA bribe or extorted money, usually relatively small in amount, provided to a low-level government official or business person, in order to expedite a business decision, shipment, or other transaction, especially in a country where such payments are not unusual.