(sports, automotive) Acronym of energy recovery system: an electric generation, storage, and propulsion system used in Formula One, which generates electricity by scavenging excess power and energy, stores energy in batteries, and boosts acceleration with electric motors assisting the gasoline engine.

plural of ER

Third-person singular simple present indicative form of er

(informal, originally school slang) Used to form slang or colloquial equivalents of words. / (informal, originally school slang) Used to form mostly adjectives used informally.

plural of be-er

Variant form of -er used in words ending with an abbreviation or (sometimes) a number.

A language spoken on Manus Island in Papua New Guinea.

One whose self-identity is in passive roles, such as experiencing and observing.

(baseball) Initialism of earned run. / (biology) Initialism of endoplasmic reticulum. / (computing) Initialism of entity-relationship. / (medicine) Initialism of emergency room.

Initialism of Elizabeth Regina (“Queen Elizabeth”). / (US politics) Initialism of Eleanor Roosevelt. / (US sports) Abbreviation of Erie (“Erie, Pennsylvania, USA”).