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Definitions

reactive

[ree-ak-tiv] / riˈæk tɪv /
ADJECTIVE
responsive
Synonyms
STRONGEST
active aware compassionate conscious receptive sensible sensitive susceptible sympathetic
WEAK
acknowledging alive answering awake bleeding-heart forthcoming impressionable influenceable kindhearted open passionate perceptive persuadable replying respondent sensile sentient sharp softhearted susceptive tender warm warmhearted
Antonyms
STRONGEST
ignorant impassive indifferent insensitive merciless senseless unaware unconscious unfeeling unfriendly unsusceptible
WEAK
unresponsive
ADJECTIVE
sensitive
Synonyms
STRONGEST
conscious delicate emotional hypersensitive keen nervous perceptive precise receptive responsive susceptible tense touchy tricky unstable
STRONG
acute feeling fine knowing psychic seeing understanding
WEAK
cognizant easily affected emotionable high-strung hung up impressible irritable oversensitive perceiving precarious sensatory sensile sensorial sensory sentient supersensitive ticklish touchy feely tuned-in turned on to umbrageous wired
Antonyms
STRONGEST
calm ignorant imprecise insensitive laid-back loose strong unaware unresponsive unsusceptible
WEAK
heartless impassive indifferent numb thick-skinned unfeeling
ADJECTIVE
susceptive
Synonyms
WEAK
acute cognizant conscious delicate easily affected emotionable emotional feeling fine high-strung hung up hypersensitive impressible impressionable irritable keen knowing nervous oversensitive perceiving perceptive precarious precise psychic receptive responsive seeing sensatory sensible sensile sensorial sensory sentient supersensitive susceptible tense ticklish touchy touchy feely tricky tuned-in turned on to umbrageous understanding unstable wired

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.

The wide-ranging proposals say reactive action would be insufficient, and online marketplaces would need to "act with due care to prevent, identify and remove dangerous products being sold via their platforms".

From BBC • Apr. 15, 2026

“Whether people are tracking food intake, monitoring sleep or asking about peptide therapies, they’re expressing the same underlying shift: from reactive to proactive,” Jeffrey Egler, Noom’s chief medical officer, said in an email last week.

From MarketWatch • Apr. 15, 2026

He describes it as "a suit of armor," designed to shield the reactive center from water and other nearby molecules.

From Science Daily • Apr. 11, 2026

Given how unpredictable the war is likely to be in coming weeks, there could be pockets of opportunity when headlines cause reactive selloffs.

From The Wall Street Journal • Apr. 7, 2026

“Well, have you noticed skin being reactive to it?”

From "Strange the Dreamer" by Laini Taylor

Vocabulary lists containing reactive

Chemical Reactions - Introductory

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Matter and Energy 2: Properties of Matter, Chemical Reactions, and Energy

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The State of the Union Address 2015

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