Dehydrated/diːˈhaɪdreɪtɪd/ Definition 1 of 3Pro Tip 1/3Not Always Serious In casual talk, 'dehydrated' may not mean extremely dry, just needing water. I'm feeling a bit dehydrated; let me grab some water. Pro Tip 2/3Climate or Weather The word can describe effects of climate or weather on people or objects. The intense sun left the soil completely dehydrated. Pro Tip 3/3Metaphorical Use It can be used metaphorically to describe things lacking vitality or freshness. The presentation was dehydrated of any new ideas.