broad-spectrum: meaning, definition, pronunciation and examples
B2Formal, technical, academic, medical, agricultural, marketing.
Quick answer
What does “broad-spectrum” mean?
Effective against a wide range or variety of things, especially microorganisms or conditions.
Audio
Pronunciation
Definition
Meaning and Definition
Effective against a wide range or variety of things, especially microorganisms or conditions.
Having wide applicability or covering many different elements within a single category; comprehensive in scope.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Slightly more common in American medical marketing, but equally standard in British technical writing.
Connotations
In both varieties, it connotes effectiveness, reliability, and comprehensiveness. In non-technical contexts, it can sometimes carry a slight marketing hyperbole.
Frequency
Comparable frequency in corpora of scientific and technical English. Rare in casual conversation.
Grammar
How to Use “broad-spectrum” in a Sentence
ADJ + N (attributive only)to be + ADJ (less common, e.g., 'The treatment is broad-spectrum')Vocabulary
Collocations
Examples
Examples of “broad-spectrum” in a Sentence
verb
British English
- N/A - not used as a verb.
American English
- N/A - not used as a verb.
adverb
British English
- N/A - not used as an adverb.
American English
- N/A - not used as an adverb.
adjective
British English
- The GP prescribed a broad-spectrum antibiotic for the chest infection.
- This new broad-spectrum fungicide is gentler on the garden's ecosystem.
American English
- The doctor started her on a broad-spectrum antiviral as a precaution.
- Look for a broad-spectrum sunscreen that blocks both UVA and UVB rays.
Usage
Meaning in Context
Business
Used in marketing to describe products (e.g., software, consulting services) that address many needs.
Academic
Common in life sciences, medicine, agriculture, and environmental science papers.
Everyday
Almost exclusively heard in contexts like buying sunscreen or hearing a doctor explain medication.
Technical
The primary domain, with precise meaning regarding range of efficacy against pathogens, wavelengths, etc.
Vocabulary
Synonyms of “broad-spectrum”
Strong
Neutral
Weak
Vocabulary
Antonyms of “broad-spectrum”
Watch out
Common Mistakes When Using “broad-spectrum”
- Using it as a noun (e.g., 'This medicine has a broad-spectrum' - incorrect).
- Hyphenation errors: must be hyphenated when used as a compound adjective before a noun.
- Overusing in non-technical contexts where 'general' or 'wide-ranging' is more natural.
FAQ
Frequently Asked Questions
Yes, when used as a compound adjective before a noun (broad-spectrum antibiotic). It may be seen without a hyphen in some technical branding, but the standard written form uses the hyphen.
It is atypical and considered a metaphorical extension. 'Broad knowledge' or 'wide-ranging knowledge' is more natural. 'Broad-spectrum' strongly prefers technical/scientific contexts.
The direct antonym is 'narrow-spectrum,' meaning effective against only a specific, limited range. 'Targeted' or 'specific' are also good general opposites.
It is formal and technical. While understood by the general public (especially through product labels), it is rarely used in casual, informal conversation.
Effective against a wide range or variety of things, especially microorganisms or conditions.
Broad-spectrum: in British English it is pronounced /ˌbrɔːd ˈspek.trəm/, and in American English it is pronounced /ˌbrɑːd ˈspek.trəm/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. It is a technical compound used literally.”
Learning
Memory Aids
Mnemonic
Think of a BROAD rainbow (spectrum) covering all the colours, not just one or two. Similarly, a broad-spectrum thing works against many types, not just one.
Conceptual Metaphor
RANGE IS WIDTH (BREADTH). Effectiveness is conceptualized as covering a wide area on a spectrum of possibilities.
Practice
Quiz
In which context is the term 'broad-spectrum' most precisely and originally used?