a, o, d, e, g, n, p, i, u, x are letters that make 'expanding upon'
pan, PA, ding, AN, PO, expand, Pa, ng, ex, up, on, in, din, Pan, IN, ND, Po, pa, In, Nd are words within 'expanding upon'
1 possible definitions for 'expanding upon'
Under this definition, expanding upon is a noun and has the following properties:
expansion has the same meaning as expanding upon
amplification, elaboration, annotation, annotating, supplementation, subjunction, subjoining are types of 'expanding upon'.
enlarge, dilate, expand, flesh out, lucubrate, expatiate, exposit, expound, elaborate are derivatives of 'expanding upon'.