"lightest" is correct and usable in written English.
You can use the word to describe the degree to which something weighs the least. For example: "The feather was the lightest object in the room."
From a London Olympics studded with failure (their lightest medal haul in 20 years) to last summer's Lions tour, it has been a lean old time, and as far as the cricket was concerned, no one was expecting matters to improve for quite a while.
Local authorities controlled by Labour in the north were hardest hit by central government cuts over the past four years, while Conservative town halls escaped the lightest, a study by the Sheffield Political Economy Research Institute (SPERI) has found.
With a delicate colour palette of ivory, rose pink, pearly grey and the lightest of heather, these were clothes that demanded the immaculate lifestyle of the wealthy women who will buy them.
Personality-wise, she was the lightest of the clones to play.
Pick the lightest colour within the wallpaper (in this case, yellow) to use on a paintable, free-standing bath.
Apart from its remarkable electrical properties (and also, thermal and acoustical properties), it is the thinnest and lightest substance known, as well as being the strongest (more than 100 times stronger than high-strength steel).
Neutralinos are the lightest of the predicted supersymmetric beasts, with a mass equivalent to that of a few hundred protons (the Higgs, by comparison, has a mass of about 124 protons).
Surely firms would choose whichever regulator imposed the lightest burden, leading regulators to compete by trying to out-lighten each other.
No such particle is known, but Susy predicts some, and as they are the lightest of its predictions, they should (if they exist) be within the LHC's range.
Though there was only a little true deregulation in this period, financial innovation grew most where regulation was lightest.
The rich world shoulders the lightest regulatory burdenSINGAPORE is the best place to do business in the world, according to an annual report by the International Finance Corporation and World Bank.
