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Dictionary.com

in operation

ADJECTIVE
effective
Synonyms
STRONGEST
active direct dynamic
WEAK
actual current in effect in execution in force operative real
Antonyms
STRONGEST
inactive
WEAK
fruitless impotent incapable ineffective inoperative unproductive useless weak
ADJECTIVE
operative
Synonyms
STRONGEST
operational usable
STRONG
current dynamic employable indicative key open running standing working
WEAK
accessible alive crucial effective efficient functional important in force live practicable relevant serviceable significant workable
Antonyms
STRONG
passive
WEAK
inactive ineffective ineffectual inoperative unfunctional unworking useless worthless
ADJECTIVE
practical
Synonyms
STRONGEST
businesslike constructive down-to-earth efficient factual feasible functional possible practicable pragmatic rational reasonable sane sensible sober workable
WEAK
applied both feet on the ground commonsensical doable empirical experimental handy hard-boiled implicit in action matter-of-fact nuts and bolts operative orderly serviceable solid sound systematic unidealistic unromantic usable utile utilitarian virtual workaday working
Antonyms
STRONGEST
excited impossible impractical inefficient irrational unattainable unfeasible unlikely unrealistic unreasonable unsound unworkable
WEAK
incapable inexperienced unproficient unseasoned unserviceable unskilled untrained useless worthless
ADJECTIVE
running
Synonyms
STRONGEST
constant functioning working
STRONG
active cursive dynamic executing going live moving operative proceeding producing smooth
WEAK
alive easy effortless fluent in action in succession incessant perpetual together unbroken unceasing uninterrupted
Antonyms
STRONG
apathetic immobile inactive unexciting
WEAK
broken discontinuous intermittent occasional

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.

After nearly 50 years in operation, available power has become extremely limited.

From Science Daily • May 4, 2026

Two of the refineries that closed were British, leaving just four in operation here.

From BBC • May 3, 2026

The project has been gradually commercializing its wind turbines since 4Q last year, with all 64 turbines expected to be in operation by 4Q 2026.

From The Wall Street Journal • Apr. 24, 2026

Times reporter Paul Dean noted that Flint helped tap the Owens Valley water that irrigated L.A.’s growth and prosperity, but the fountain named for him had not been in operation for 30 years.

From Los Angeles Times • Apr. 11, 2026

Once they passed a snow machine in operation, with the Cloud-Men turning the handle and a blizzard of snowflakes blowing out of the great funnel above.

From "James and the Giant Peach" by Roald Dahl