lubricator

lubricator — noun

1. a worker whose job is to apply oil or grease to the moving parts of machines in

1.nounC2
Definition

a worker whose job is to apply oil or grease to the moving parts of machines in order to keep them operating smoothly and to prevent damage from friction

Example

The factory hired an extra lubricator to grease the conveyor belts before the night shift.

countable noun for a job role

Every morning the lubricator walked through the engine room with a long-spout oil can.

Common collocations
  • experienced lubricator
  • factory lubricator
  • lubricator greases
  • lubricator oils
  • lubricator walks
Synonyms
  • oiler

    a more informal, older term often used in railway and factory contexts

  • greaser

    emphasises the use of heavy grease rather than oil; more common in US English

Grammar Patterns

lubricator + verb (singular / plural)

Usage Note

Historically common in factories and railways; today the role is often part of a maintenance technician's duties rather than a standalone job title.

Common Mistakes

The lubricator is a sticky liquid we put on the chain.
The lubricator is the person who greases the machines.
A lubricator is a person or a device, not a substance; the substance itself is a lubricant.

2. a substance — usually oil, grease, or a synthetic fluid — that is placed between

2.nounC1
Definition

a substance — usually oil, grease, or a synthetic fluid — that is placed between two moving surfaces to reduce friction, heat, and wear

Example

The mechanic chose a high-temperature lubricator for the oven conveyor system.

countable: a type/grade of lubricant

Too little lubricator on the chains caused them to overheat and stretch.

uncountable: lubricator as a mass substance

Common collocations
  • high-temperature lubricator
  • synthetic lubricator
  • lubricator reduces friction
  • apply lubricator
  • industrial lubricator
Synonyms
  • lubricant

    the standard modern word for a friction-reducing substance; much more common than 'lubricator'

  • oil

    the most common type of lubricant; narrower in meaning

  • grease

    a semi-solid lubricant, thicker than oil

Antonyms
  • abrasive

    a substance that wears surfaces down rather than protecting them

Grammar Patterns

lubricator + verb (used as substance noun)

Usage Note

In technical writing, 'lubricator' as a substance is far less common than 'lubricant' — it appears mostly in older manuals and specialised product catalogues.

Common Mistakes

I put some lubricator on the squeaky door.
I put some lubricant on the squeaky door.
For everyday situations, 'lubricant' is the natural word; 'lubricator' referring to a substance sounds dated or technical.

3. a tool, can, or mechanical fitting designed to deliver a measured amount of oil

3.nounC2
Definition

a tool, can, or mechanical fitting designed to deliver a measured amount of oil or grease to a specific point on a machine

Example

The mechanic attached a drip-feed lubricator to the lathe so the cutting tool stayed oiled automatically.

drip-feed lubricator — common compound noun

The pneumatic lubricator injects a fine mist of oil into the air line every cycle.

Common collocations
  • drip-feed lubricator
  • pneumatic lubricator
  • automatic lubricator
  • hand-pump lubricator
  • lubricator injects
  • lubricator delivers
Synonyms
  • oiler

    a simpler word for a hand-held oil can or a device that applies oil

  • grease gun

    a specific type of lubricator that forces grease into fittings under pressure

  • lubrication system

    a broader term that may include pipes, pumps, filters, and controllers

Grammar Patterns

lubricator + verb (device)

Word family

Synonym discussion

Sense: noun/2

The word 'lubricator' as a substance is largely superseded by 'lubricant', which is the modern, everyday term for any friction-reducing material. 'Oil' refers specifically to liquid lubricants — usually petroleum-based — and is the most widely recognised type. 'Grease' is a semi-solid lubricant, typically a mix of oil and a thickener such as lithium soap, used where a liquid would drip away. 'Lubricator' in this sense sounds dated or technical and appears mostly in older manuals and specialised catalogues. For example, you would say 'put some lubricant on the chain' (not 'lubricator'), and you would ask for 'motor oil' or 'bearing grease' depending on the application. If you read 'high-temperature lubricator' on a product label, treat it as a synonym for 'high-temperature lubricant'.

lubricant ↗oil ↗grease ↗lubricator ↗

Common collocations

Nouns

Adverbs

Phrases

  • drip-feed lubricator
  • sight-glass lubricator
  • hand-pump lubricator
  • pneumatic lubricator
  • automatic lubricator

Prepositions

Etymology

LatinEnglish

Derived from the verb 'lubricate' (to make smooth or slippery), which comes from the Latin 'lubricatus', past participle of 'lubricare' meaning 'to make slippery', from 'lubricus' meaning 'slippery'. The suffix '-or' (from Latin '-or') indicates an agent — a person or thing that performs the action. The word entered English in the early 19th century alongside the Industrial Revolution, when machines needed dedicated workers and devices to apply oil and grease.