The word "seal" can have different meanings, but in general, it refers to a creature or a device used to close or secure something. It can also describe a mark or signature that is used for validation or confirmation. Full definition
All documents required must be original documents, but certified copies with lifted seal of the original documents are acceptable. (chabilmarvillas.com)
I store them in sealed containers in the freezer for whenever I need them. (theorganicdietitian.com)
I have NEVER (knock on wood) had my jam not seal with this method and they have never gone bad. (gooddinnermom.com)