We present observations of SO/sub 2/ toward the Orion KL Nebula. Fourteen transitions of SO/sub 2/ and /sup 34/SO/sub 2/, which span a range of excitation up to 365 K above the ground state, were detected. The SO/sub 2/ lines cannot be fitted by an optically thin source model with a single rotational temperature. Partial saturation of the strongest SO/sub 2/ lines and an increase in the rotational SO/sub 2/ rotation temperature probably indicates the kinetic temperature of the plateau source, since it agrees with other estimates of the kinetic temperature in this region. No strong variation in rotational temperature with velocity is found for at least the central +- 20 km s/sup -1/ of the SO/sub 2/ plateau. The size of the SO/sub 2/ emitting region in Orion was estimated to be ..7) and H/sub 2/CO(1/sub 01/..-->..0/sub 00/) in several sources.« less