used for saying that an amount a number is 50% greater than another amount number
A flat in London costs half as much again as a similar flat in Glasgow.
Thesaurus: fractions and types of fractionhyponym
Main entry: half
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ˌhalf as ˌmany, ˌmuch, etc. aˈgain idiom
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Spending on health is half as much again as it was in 2009.
Useful english dictionary. 2012.