There are 2 definitions of clear up in English:

clear up1

1(Of an illness or other medical condition) become cured: all my health problems cleared up
More example sentences
  • After taking medication, Sarah's condition appeared to clear up.
  • They offer to change your life by clearing up chronic conditions, lifting depressions, boosting your immune system and making you happy as well as healthy.
  • The condition usually clears up within 7 to 14 days.
2(Of the weather) become brighter: I said I would fix the roof when the weather clears up
More example sentences
  • If the weather clears up a little we might even go camping.
  • Of course, the weather soon cleared up again and July started nicely.
  • The weather has cleared up a lot and it's now sunny, but still windy.
2.1(Of rain) stop: the drizzle looked unlikely to clear up
More example sentences
  • And after three days of heavy rain, it cleared up minutes before the ceremony.
  • There didn't seem to be quite a big a rush at first this year, but they began to pack in as the day went on, when the rain cleared up.
  • The rain even cleared up by the time we got to the registry office which meant we could take photos outside.
See parent entry: clear

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Pronunciation: fɪˌɔːrɪˈt(j)ʊərə
noun
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There are 2 definitions of clear up in English:

clear-up2

Line breaks: clear-up

noun

1A removal and tidying away of rubbish or obstructions.
More example sentences
  • It could be that someone has a bit of spare space in a greenhouse, or it may be that people want to help with litter clear-ups.
  • Parishioners had been left baffled by the regular clear-ups around their church.
  • The lorry was finally righted at 1.30 am and the clear-up went on till 2.30 am, as the rubbish was loaded onto new lorries, and the road was finally re-opened to traffic.
2 [mass noun] The solving of crimes by the police: [as modifier]: Welsh police had one of the most successful clear-up rates
More example sentences
  • It is understood the investigation will consider claims that officers have asked convicted crooks to take the blame for unsolved crimes to improve the police clear-up rate.
  • The campaign to drive up police detection and clear-up rates was announced at a police conference.
  • With DNA evidence, the average crime clear-up rate increases from 24 per cent to 43 per cent.