A "sealed package" refers to a bag, box, or container that is completely closed and cannot be opened without breaking its seal or opening mechanism. Full definition
To answer the question, yes, it will keep well in sealed packages in the freezer. (fieryfoodscentral.com)
The incumbent will operate, repair and perform general maintenance on form and seal packaging machines. (ziprecruiter.com)
They are widely available fresh in vacuum sealed packages at supermarkets and can be tossed with a variety of sauces, such as pesto, tomato sauce, butter sauce. (nutritiouseats.com)