mechanisms

IPA/ˈmek.ə.nɪ.zəm/
KK[mˈɛkənˌɪzəmz]IPA/ˈmek.ə.nɪ.zəm/

mechanisms — noun

  • mechanismssingular
  • mechanismsesplural

1. a part or set of parts inside a machine or device that move or work together so

1.nounB2
Definition

a part or set of parts inside a machine or device that move or work together so that the machine can perform a specific task — for example, the winding mechanism of a watch or the lifting mechanism of a crane.

Example

Theo opened the back of the remote control to look at its small plastic mechanism.

countable noun: a single part inside a device

A safety mechanism on the elevator stops it from moving when the doors are open.

compound noun: safety mechanism

Common collocations
  • winding mechanism
  • locking mechanism
  • safety mechanism
  • trigger mechanism
  • release mechanism
  • paper-feeding mechanism
Synonyms
  • device

    a broader term; a mechanism is one type of device with moving parts

  • apparatus

    more formal and implies a more complex piece of equipment

  • machinery

    uncountable and refers to machines as a whole, not a single part

Grammar Patterns

mechanism + for + noun/gerund

mechanism + of + noun

Usage Note

This sense is always countable. It often pairs with a compound noun that names the device's function (e.g. locking mechanism, safety mechanism, winding mechanism). The plural form mechanisms is used when referring to more than one part or system within a machine.

Common Mistakes

The mechanism of the printer is jammed.' (vague)
The paper-feeding mechanism in the printer is jammed.
naming the specific part makes the sentence clearer and more natural.

2. an organised system, method, or set of processes that is designed to achieve a p

2.nounB2
Definition

an organised system, method, or set of processes that is designed to achieve a particular result, or that explains how something happens in nature, business, or society — for example, a legal mechanism for resolving disputes, or the biological mechanism by which a plant converts sunlight into food.

Example

Yasmin studied the mechanism by which the human body regulates its temperature.

mechanism + by which + clause: explaining how a natural process works

The university has a clear mechanism for handling student complaints within thirty days.

mechanism + for + gerund: describing a formal process

Common collocations
  • legal mechanism
  • regulatory mechanism
  • feedback mechanism
  • defence mechanism
  • pricing mechanism
  • market mechanism
Synonyms
  • system

    broader; a system may not have the step-by-step procedural nature that a mechanism implies

  • process

    focuses on the sequence of events rather than the organised structure

  • procedure

    suggests a formal, step-by-step method, often in an institutional setting

Grammar Patterns

mechanism + for + noun/gerund

mechanism + of + noun

mechanism + by which + clause

Usage Note

Frequently used with of or for to introduce the goal or domain of the process (e.g. mechanism of evolution, mechanism for reporting errors). In academic and technical writing, mechanism by which is a common pattern that introduces an explanation of cause and effect.

Common Mistakes

The mechanism of solve the problem is unclear.
The mechanism for solving the problem is unclear.
after mechanism, use for + gerund, not of + bare verb.
We need a mechanism to protect personal data.' (acceptable but vague)
We need a mechanism for protecting personal data.
the for + gerund pattern is more formal and natural in this sense.

3. an unconscious pattern of thoughts, feelings, or actions that your mind uses to

3.nounB2
Definition

an unconscious pattern of thoughts, feelings, or actions that your mind uses to protect you from emotional pain, anxiety, or situations that feel too difficult to handle — for example, making jokes about a frightening event instead of showing fear.

Example

After losing her job, Amelia developed a coping mechanism of going for a long run every morning.

compound: coping mechanism — a behaviour that helps manage stress

The therapist explained that blaming others was a defence mechanism Ari used to protect his self-esteem.

compound: defence mechanism — an unconscious protective response

Common collocations
  • defence mechanism
  • coping mechanism
  • psychological mechanism
  • unconscious mechanism
  • survival mechanism
Synonyms
  • strategy

    a strategy can be deliberate; a psychological mechanism is unconscious

  • response

    broader and less technical; not limited to unconscious protection

  • reaction

    focuses on the outcome rather than the inner process

Grammar Patterns

defence mechanism

coping mechanism

mechanism for + gerund

Usage Note

Commonly appears in the compounds defence mechanism and coping mechanism. Unlike the other two senses, this sense always refers to an unconscious mental process, not a deliberate strategy. The phrase defence mechanism comes from Freudian psychology but is now used in everyday language.

Common Mistakes

I used a defence mechanism to finish my homework on time.
Procrastination was his defence mechanism whenever he felt anxious about an exam.
a defence mechanism is unconscious, not a deliberate plan to get work done.
Exercising is a good cope mechanism.
Exercising is a good coping mechanism.
the correct adjective form is coping, not cope.

Word family

Synonym discussion

Sense: noun/2

All four words refer to a way of doing something, but they differ in scope and feel. System is the broadest term — it describes a set of connected parts that work together, whether physical (a railway system) or abstract (a filing system). Process focuses on the sequence of steps over time, with less emphasis on structure (the hiring process takes two weeks). Procedure is more rigid and formal, often implying official rules or steps that must be followed (hospital safety procedures). Mechanism, in this sense, sits between system and process: it emphasises both the organised structure and the cause-effect relationship — a mechanism for resolving disputes suggests a designed structure that leads to a predictable outcome, whereas a dispute resolution system could be informal and unplanned. Use mechanism when you want to highlight that the parts fit together logically to produce a result, such as a market mechanism that sets prices or a biological mechanism that regulates body temperature.

system ↗process ↗procedure ↗method ↗

Common collocations

Nouns

  • mechanism design
  • mechanism analysis
  • mechanism type

Adverbs

Phrases

  • mechanism for doing something
  • mechanism by which something happens
  • the mechanism behind something

Prepositions

Etymology

GreekLatinFrenchEnglish

The word 'mechanism' comes from the Greek word 'mēkhanē' (a machine or device), which passed into Latin as 'mechanismus' and then into English through French 'mécanisme'. Originally used only for machines, it was extended during the 1600s and 1700s to describe systems of natural processes (the mechanism of digestion) and, by the 1800s, to psychological processes (defence mechanism).

First known use

1662

1662, in the meaning defined at sense 1a