Synonym: grippe, influenza. Similar words: flunk, fluid, fluke, flush, fluent, fluffy, influx, fluster. Meaning: [fluː] 
n. an acute febrile highly contagious viral disease.
n. an acute febrile highly contagious viral disease. 
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91. This was a light epidemic of flu and there was no danger if you avoided pneumonia.
92. The flu epidemic has put a huge strain on the health service.
93. I got flu and was out of commission for a week.
94. He was pretty ill with the flu, but he bounced back nicely.
95. The doctor said it was just the flu. What a relief!
96. My secretary's been off with flu for the past week.Sentencedict.com
97. There are several absentees in the school this week, because a lot of people have got flu.
98. The flu has laid him up for a few days.
99. Vaccine supplies started to run dry as the flu outbreak reached epidemic proportions.
100. Anyone who wants to avoid the flu should consider getting a vaccination.
101. I was in bed with the flu. My wife can vouch for that.
102. I was off sick for four days with the flu.
103. I'm pretty indestructible; it takes more than a bout of flu to lay me low.
104. I think I'm getting a cold or flu - I've been coughing and sneezing all day.
105. I think I must be coming down with flu - I've been feeling wretched all day.
106. Flu is highly infectious.
107. Gill's down with flu.
108. It is necessary to make new batches of flu vaccine whenever a different, virulent strain of flu makes an appearance.
109. She's very hot and shivery, so I think she must have flu.
110. He had a bad dose of the flu virus that was going around.
111. Vitamin C is thought to help fight colds and flu.
112. Tiredness and fever are much more likely to be a sign of flu coming on.
113. A dose of flu kept me off work for two weeks.
114. Giving every patient an annual anti - flu injection would be prohibitively expensive.
115. I have had really bad bouts of flu that have really dragged me down.
116. Over fifty people died during the flu epidemic last winter.
117. I've been off my food ever since I had the flu last month.
118. I can personally attest that the cold and flu season is here.
119. I'm slowly recovering my strength after a bout of flu.
120. She's been laid up in bed with flu for a week.
More similar words: flunk, fluid, fluke, flush, fluent, fluffy, influx, fluster, fluency, effluent, affluent, influenza, superfluity, flustered, influence, fluctuate, effluence, superfluous, confluence, fluorescent, fluctuation, mellifluous, influential.