Middle English perhaps fromlightento make less heavyfrom Old English līhtanlegwh- in Indo-European roots
It is slightly lighter than air.
Although they were the same shape, they were lighter, like comparing plastic beads to glass ones.
A structure loomed darkly against the lighter horizon.
It was getting lighter and lighter, but the mist still hid distant objects.
The closing of the traffic made the labour of the slaves more severe, and led to the employment on the plantations of many who before had been engaged in domestic work; but the slavery of Brazil had always been lighter than that of the United States.