to close (something) tightly so that air, liquid, etc., cannot get in or out —often + up
to close (an envelope, bag, etc.) by sticking or pressing two of its parts together
to become closed tightly
2sealnoun
an official mark that is stamped on paper or on a small piece of wax to show that something (such as a document) is genuine and has been officially approved
a small piece of stamped wax or a small sticker that is put on a letter or envelope to keep it closed or to show that it has not been opened
a device with a raised design that can be pressed into something (such as paper or wax) to make a seal
3sealnoun
a large animal that lives in the sea near coasts, has flippers, and eats fish
the skin of a seal usually used for fur
4sealnoun
a soldier in the U.S. Navy who has special training and belongs to a small group that performs dangerous missions
