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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121. Pressure in the container remains constant.
122. She was wearied by the constant noise.
123. Rates of home ownership have remained relatively constant.
124. Money is a constant source of worry.
125. The constant rain dulled all sound.
126. I'm really fed up with this constant rain.
127. His constant complaints were straining our patience.
128. The reporters kept up a constant barrage of questions.
129. Constant wheelchair use will scuff almost any floor surface.
130. Jane's constant chatter was beginning to annoy him.
131. The baby's constant crying drove me to distraction.
132. The constant fighting made life at home intolerable.
133. He was weary of the constant battle between them.
134. She yelled at him about his constant drunkenness.
135. The fridge keeps food at a constant temperature.
136. We had a constant stream of visitors.
137. He's verging on 80 now and needs constant attention.
138. His constant joking was beginning to annoy her.
139. Amy lived in constant fear of being attacked.
140. He was hotted up by her constant chatter.
141. Man is engaged in a constant struggle with Nature.
142. He's been a constant source of worry .
142. Sentencedict.com is a online sentence dictionary, on which you can find good sentences for a large number of words.
143. I've had enough of your constant chatter.
144. His constant criticism ate away at her self-confidence.
145. He is being hatcheled severely by constant telephones' calling.
146. The army maintains a constant presence in the area.
147. The truck was travelling at a fairly constant speed.
148. Big pension funds have a constant flow of cash.
149. Constant rubbing will fray even the thickest rope.
150. I can't listen to his constant babble.
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.