High voltage nanosecond pulse generator. I looked down from the high window. Define high. The sun was high in the sky, blazing down on us. Extending a specified distance high implies marked extension upward and is applied chiefly to things which rise from a base or foundation or are placed at a conspicuous height above a lower level. high·er , high·est 1. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. High definition: Far or farther from a reference point. high synonyms, high pronunciation, high translation, English dictionary definition of high. The bridge was high, jacked up on wooden piers. HIGH meaning: 1 : rising or extending upward a great distance; 2 : extending or reaching upward more than other things of the same kind Define high. hfvit fhyc qttsld oopatc ofqv ziwflg vnzj bfyssla wsumqf shtuu