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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211. At any given instant the distribution of molecular speeds is always constant under the same conditions.
212. I had a constant stream of visitors while I was ill.
213. It is important to maintain a constant temperature inside the greenhouse.
214. The events business, she said, was crucial to the group in that it provides a constant revenue stream.
215. The constant partygoing of her later years was a desperate camouflage for her grief.
216. At the other end of the scale, life is a constant struggle to get enough to eat.
217. In the world of fashion it sometimes seems that the only constant is ceaseless change.
218. The seeing eye dog was the blind man's constant companion.
219. Children weary me all day with their constant inquiries and demands.
220. Our proposal met with the constant refrain that the company could not afford it.
221. I found it hard to work with all the noise and constant interruptions.
222. Ade's constant absences from work made his boss very angry.
223. The baby was a constant delight and source of amazement.
224. Constant injury problems had made it tough for him to hold down a regular first team place.
225. He found a remedy for his grief in constant hard work.
226. Her reply was typical of her constant regard for self.
227. Her life is a constant juggling act, coping with career, family[sentencedict.com], and home life single-handed.
228. The sheer size of the cathedral is a constant reminder to the tourist of the power of religion.
229. Poverty is / The poor are a constant reproach to our society.
230. Her constant questions really put my patience to the test!
231. The money side of things has been a constant worry.
232. These figures were virtually constant across the 1991 and 2001 censuses.
233. Unfortunately,[http://sentencedict.com] the simplicity of this message is almost lost within his constant management-speak.
234. The threat of losing their jobs is a constant source of worry to them.
235. Constant rain forced the abandonment of the next day's competitions.
236. The action of market forces means that the cost of something rises if demand for it rises and the amount available remains constant.
237. He lived in constant dread that one day he might be found out.
238. His apartment was on a main road and there was a constant roar of traffic from down below.
239. Their constant arguments were putting a strain on their marriage.
240. It was a constant wonder to me that my father didn't die of exhaustion.
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.