What does aerator mean?
An aerator is any device designed to introduce air into something else — most commonly soil, water, or another liquid. In gardening, an aerator is a machine, often with hollow tines or spikes, that punches holes in compacted turf so that oxygen, water, and nutrients can reach grass roots; homeowners typically rent one for seasonal lawn care. In plumbing, an aerator is the small screened fitting at the tip of a faucet that blends air into the water stream, softening the flow and reducing splashing while conserving water. The word also covers specialized equipment: wastewater treatment plants rely on large aerators to oxygenate effluent so microbes can break down organic matter, and wine drinkers use small handheld aerators to expose red wine to air and soften its flavour. Derived from the Latin root for air, the term is functional and technical in register, appearing chiefly in home improvement, horticultural, and engineering contexts.
nounA device or agent that introduces air into a material, such as soil, water, or a liquid. Common examples include lawn aerators that perforate turf and faucet aerators that mix air into a water stream.
- A device that introduces air into soil, especially one that perforates lawns or turf to relieve compaction.
- A fitting, such as on a faucet, that mixes air with water to reduce splashing and consumption.
- Any machine or agent that aerates a substance, such as wastewater treatment equipment or a wine aerator.
"The groundskeeper ran the aerator over the compacted fairway to let oxygen reach the grass roots."
"Before overseeding in autumn, he hired a core aerator to pull small plugs of soil from the lawn."
"The restaurant served the young red wine through an aerator to soften its tannins."
Regular plural; used when referring to multiple devices or models.
"The hardware store stocks several types of aerators for garden hoses."
That little mesh disc screwed onto the end of your kitchen faucet is an aerator — and it can cut your water use dramatically by mixing air into the stream without you noticing.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of aerator
The word 'aerator' derives from the verb 'aerate', which was formed in the late eighteenth century from Latin 'aer' meaning 'air' — itself borrowed from Greek 'aēr'. The agent suffix '-or' marks it as a thing that performs the action of aerating. It belongs to a family of English words built on the same classical root for air, including 'aerial', 'aerobic', and 'aerosol'.
How aerator is actually used
An everyday practical noun rather than a literary one; it appears most often in gardening, plumbing, winemaking, and wastewater engineering contexts. The specific referent is usually clear from context, so writers typically pair it with a modifier like 'lawn', 'faucet', or 'wine'.
Easily confused with aerator
'Aerator' is the only standard spelling; forms like 'airator' are misspellings, not distinct words.