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up the ante. verb phrase. To raise the price, offer, sum in question, etc; increase; make a higher demand: I think I may up the ante to a cool fifty/ The trader decides to up the ante. [1970s+; fr the ante in poker, which gives one the right to take part]
In western Europe it was generally a narrow open ante-chamber with sloping roof and closed on the smaller sides, which were probably, when connected with the main buildings, provided with apses, as in the baptistery of San Giovanni at Rome.