This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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ad. Imprecise but close to in quantity or amount.

ad. With approximation; so as to approximate; nearly.

In an approximate manner; by approximation; nearly; closely.

ad. (of quantities) imprecise but fairly close to correct

"We continued to expect the global CRM market to grow at a mid single digit rate, which we define as approximately 4% to 6% growth on a constant currency basis."

definitely    exactly    precisely    accurately   

circa   

approximate   

nearly    about    almost    near    loosely    roughly    around   

ahead    6    12    almost    ×    5x    10-15    apart    45    ±