1 increase, expand, magnify, amplify, extend, swell, dilate, spread, wax, widen, broaden, lengthen, elongate, stretch, distend; add to, supplement, augment; inflate; Colloq blow up:
The government will enlarge the area devoted to public parks. Enlarge the photographs and details appear.
2 enlarge on or upon. expand on, expatiate on, amplify, expound; detail, elaborate (on):
The speaker was asked to enlarge on her plans for building new hospitals.