4. adj. Voluntary; a layman living in a monastery under a modified rule and without vows; opposite of "oblate" Etymology: Medieval Latin prolatus, literally, one offered up, from Latin, past participle of profferre (more at PROFFER)

I found this one particularly interesting since it is claimed that this is the opposite of "oblate" but it is, in fact, a legitimate definition of oblate. Oblate is also an opposite (sort of ) of prolate, being a spheroid squashed along the polar diameter. The Earth is an oblate spheroid.