The language is a spectrum. "Fund the previously announced acquisition of X" is specific and testable. "General corporate purposes, including working capital" means the money is being raised because the company needs it, not because an opportunity appeared.
Pair it with the cash balance and quarterly burn from the last filing. A raise that extends runway from two quarters to eight quarters changes the survival odds; a raise that buys an asset at a price below the implied value of the shares sold is accretive even though it dilutes.
Example: a company with $60M cash burning $25M a quarter has under 2.5 quarters of runway. A $200M raise takes runway to 10.4 quarters, which usually matters more to the stock than the 15% dilution it caused.
Related: dilution, follow-on-offering, shelf-registration, accretive-dilutive, secondary-offering