ayer

"Ayer" redirects here. For other meanings, see Ayer (disambiguation). Sir Alfred Jules Ayer (October 29, 1910 –  June 27, 1989), better known as A. J. Ayer, was a British philosopher known for his promotion of logical positivism, particularly in his books Language, Truth and Logic (1936) and The Problem of Knowledge (1956).
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adv. yesterday, on the day before the present day

n. yesterday, day before the present day

= yesterday.
Ex: Obviously it would have been most desirable to have at least Ed Blume here yesterday to respond to some of Joan Marshall's particular criticisms, and more importantly, to have visibility.
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* ayer por la tarde = yesterday afternoon.

see AIR