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Definitions

antibacterial

[an-tee-bak-teer-ee-uhl, an-tahy-] / ˌæn ti bækˈtɪər i əl, ˌæn taɪ- /
ADJECTIVE
antiseptic
Synonyms
STRONGEST
hygienic sterile
STRONG
antibiotic clean disinfectant prophylactic
WEAK
aseptic bactericidal germ-destroying germ-free germicidal medicated pure purifying sanitary sterilized sterilizing unpolluted
Antonyms
STRONGEST
dirty
WEAK
contaminated polluted unclean unsanitary unsterile

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

With its straightforward chemical structure, strong antibacterial power, apparent resistance-proof profile, and scalable production process, pre-methylenomycin C lactone stands out as a promising new candidate.

From Science Daily • Oct. 29, 2025

Studies support these claims, showing that probiotics like Lactobacillus can help with acne by producing antibacterial compounds that inhibit C. acnes and by reducing inflammation.

From Slate • Feb. 22, 2025

Same with coconut oil, which has antibacterial properties that could help reduce dark spots and tighten skin.

From Salon • Jan. 25, 2025

All four plants showed antibacterial activity against at least one multidrug-resistant strain of the bug, E. coli.

From BBC • Sep. 11, 2024

I pull out an antibacterial wipe and clean my desk.

From "Popcorn" by Rob Harrell

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.