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noun re·sis·tance \ ri-ˈzi-stən(t)s \

Definition of resistance

1 a : an act or instance of resisting : opposition
b : a means of resisting
2 : the power or capacity to resist: such as
a : the inherent ability of an organism to resist harmful influences (such as disease, toxic agents, or infection)
b : the capacity of a species or strain of microorganism to survive exposure to a toxic agent (such as a drug) formerly effective against it
3 : an opposing or retarding force
4 a : the opposition offered by a body or substance to the passage through it of a steady electric current
b : a source of resistance
5 : a psychological defense mechanism wherein a patient rejects, denies, or otherwise opposes the therapeutic efforts of a psychotherapist
6 often capitalized : an underground organization of a conquered or nearly conquered country engaging in sabotage and secret operations against occupation forces and collaborators

Examples of resistance in a Sentence

  1. They have shown a stubborn resistance to change.

  2. The troops met heavy resistance as they approached the city.

  3. The paint shows good weather resistance.

  4. Over time the patient could develop a resistance to the drug.

Recent Examples of resistance from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'resistance.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of resistance

14th century

in the meaning defined at sense 1a

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2

resistance

adjective

Definition of resistance

: of, relating to, or being exercise involving pushing or pulling against a source of resistance (such as a weight) to increase strength
  • resistance training

First Known Use of resistance

1976

in the meaning defined above

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Financial Definition of RESISTANCE

resistance

What It Is

In technical trading analysis, resistance is an upper limit in a price channel in which a security’s price tends to stay.

How It Works

Price channels can slope up (indicating Puma ATHLETICS Black STYLE POLO ATHLETICS STYLE POLO Black Puma Puma Aftnnz0 sentiment) or down (indicating bearish sentiment); they don’t have to simply go “sideways.” The important geometric characteristic is that the resistance lines and support lines (the opposite of the resistance) are parallel, as shown in this price channel for ChevronTexaco (CVX). The channel lines themselves are often based on multiday moving averages or logarithmic scales that reflect price movements in percentage terms. However, technical trading is as much an art as it is a science, and so one technical trader’s price channel might be different from another’s.

When a stock’s price touches the resistance, this may signal a trend change, which is why resistance levels are very important to technical traders.

Why It Matters

Price channels help tip traders off about trend changes in a stock or “unusual” activity when the price goes above or below the price channel lines (we call this a breakout). For example, a technical trader might sell when a stock hits resistance on a downward-sloping channel.



RESISTANCE Defined for English Language Learners

resistance

Definition of resistance for English Language Learners

  • : refusal to accept something new or different

  • : effort made to stop or to fight against someone or something

  • : the ability to prevent something from having an effect


RESISTANCE Defined for Kids

resistance

noun re·sis·tance \ ri-ˈzi-stəns \

Definition of resistance for Students

1 : an act or instance of opposing
2 : the ability to withstand the force or effect of
  • resistance to disease
3 : an opposing or slowing force
  • The car's sleek design reduces wind resistance.
4 : the opposition offered by a substance to the passage through it of an electric current

FRABERGA Black FRABERGA Black Medical Dictionary

resistance

noun re·sis·tance \ ri-ˈzis-tən(t)s \

medical Definition of resistance

1 a : power or capacity to resist; especially : the inherent ability of an organism to resist harmful influences (as disease, toxic agents, or infection)
b : the capacity of a species or strain of microorganism to survive exposure to a toxic agent (as a drug) formerly effective against it due to genetic mutation and selection for and accumulation of genes conferring protection from the agent especially as a result of overuse of the agent which selectively destroys individual microorganisms lacking the protective genes
2 a : the opposition offered by a body to the passage through it of a steady electric current
b : opposition or impediment to the flow of a fluid (as blood or respiratory gases) through one or more passages — see vascular resistance
3 : a psychological defense mechanism wherein a psychoanalysis patient rejects, denies, or otherwise opposes therapeutic efforts by the analyst


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Origin
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