Antonym: changeable, inconstant, mutable. Similar words: instant, instantly, consultant, instance, distant, for instance, assistant, substantial. Meaning: ['kɑnstənt /'kɒn-] 
n. 1. a quantity that does not vary 2. a number representing a quantity assumed to have a fixed value in a specified mathematical context. adj. 1. persistent in occurrence and unvarying in nature 2. continually recurring or continuing without interruption 3. steadfast in purpose or devotion or affection 4. uninterrupted in time and indefinitely long continuing.
n. 1. a quantity that does not vary 2. a number representing a quantity assumed to have a fixed value in a specified mathematical context. adj. 1. persistent in occurrence and unvarying in nature 2. continually recurring or continuing without interruption 3. steadfast in purpose or devotion or affection 4. uninterrupted in time and indefinitely long continuing. 
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181. His life seems to be in a constant state of chaos.
182. The refrigerator keeps your food at a constant temperature .
183. He's been trying my patience all morning with his constant questions.
184. He kept in constant contact with his family while he was in Australia.
185. Despite his constant protes-tations of devotion and love, her doubts persisted.
186. The noise of traffic is a constant irritant to city dwellers.
187. The cat was in constant pain so they had it put down.
188. We conceive of the family as being in a constant state of change.
189. When sailing, keep a constant check on changes in wind direction.
190. Constant revision of the curriculum must be undertaken to ensure its continuing relevance.
191. A constant threat of unemployment hangs over thousands of university researchers.
192. Constant interruptions are very aggravating when you're trying to work.
193. In the end, I just got fed up with his constant complaining.
194. It takes constant effort to become fluent in a language.
195. The woman, who needs constant attention,(sentencedict.com) is cared for by relatives.
196. She has fought a constant battle with depression throughout her career.
197. Kids today are raised on a constant diet of pop music and television.
198. There was a constant tug-of-war between the military and the President.
199. The great drawback to living on a main road is the constant noise.
200. The city has been under constant bombardment for three days.
201. The temperature remained constant while pressure was a variable in the experiment.
202. The constant winds had stunted the growth of plants and bushes.
203. If money wages remain constant and price levels rise,[Sentencedict] real wages fall.
204. Parts of the motor wore out because of constant usage.
205. The presence of the army has been a constant irritant.
206. Constant use had fretted the sandal strap to the breaking point.
207. The classroom was in a constant state of anarchy .
208. The stones had been worn smooth by the constant flow of water.
209. And I was among a great chorus out on the hustings speaking out against this consistent and constant deficit spending.
210. The dynamic of the market demands constant change and adjustment.
More similar words: instant, instantly, consultant, instance, distant, for instance, assistant, substantial, construct, substantially, constraint, constitute, construction, constitution, constructing, constitutional, non-stop, monster, stand, install, stand by, stand for, stance, stand up, stand out, important, reluctant, standard, CONS, demonstrate.