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The Collaborative International Dictionary of English v.0.48:

Aerate \A"["e]r*ate\, v. t. [imp. & p. p. A["e]rated; p. pr. & vb. n. A["e]rating.] [Cf. F. a['e]rer. See Air, v. t.] 1. To combine or charge with gas; usually with carbonic acid gas, formerly called fixed air. [1913 Webster] His sparkling sallies bubbled up as from a["e]rated natural fountains. --Carlyle. [1913 Webster] 2. To supply or impregnate with common air; as, to a["e]rate soil; to a["e]rate water. [1913 Webster] 3. (Physiol.) To expose to the chemical action of air; to oxygenate (the blood) by respiration; to arterialize. [1913 Webster] 4. cause a change by passing air through (of sewage) Syn: activate [WordNet 1.5] A["e]rated bread, bread raised by charging dough with carbonic acid gas, instead of generating the gas in the dough by fermentation. [1913 Webster]