n. Originally, a mixture of spirit and water served out to sailors, called, according to the proportion of water, two-water grog, three-water grog, etc.n. Hence Strong drink of any sort: used, like rum, as a general term and in reprobation. Compare groggery.n. See the extract.To make into grog by mixing with water, as spirits.To extract grog from, as the wood of an empty spiritcask, by pouring hot water into it.