We present a measurement of the Drell-Yan cross section at high dielectron
invariant mass using 120 pb(-1) of data collected in p (p) over bar, collis
ions at root s = 1.8TeV by the D0 Collaboration during 1992-1996. No deviat
ion from standard model expectations is observed. We use the data to set li
mits on the quark-electron compositeness scale. The 95% confidence level lo
wer limits on the compositeness scale vary between 3.3 and 6.1 TeV dependin
g on the assumed form of the effective contact interaction.