1 become wider; "His pupils were dilated" [syn: dilate]
2 cause to expand as it by internal pressure; "The gas distended the animal's body"
3 swell from or as if from internal pressure; "The distended bellies of the starving cows"
Distension generally refers to an enlargement or ballooning effect:
add to, aggrandize, amplify, augment, bag, balloon, belly, belly out, bilge, billow, bloat, blow up, bouge, broaden, bug, build, build up, bulge, bulk, bulk out, crescendo, develop, dilate, enlarge, expand, extend, fill out, goggle, greaten, hike, hike up, huff, increase, inflate, lengthen, magnify, pooch, pop, pouch, pout, puff, puff up, pump, pump up, raise, rarefy, round out, snowball, stretch, sufflate, swell, swell out, tumefy, up, widen