seal
  • noun a mammal with a sleek body and flippers that swims in cold seas
  • To close securely or hermetically to avoid any leaking in or out, of air, moisture, contaminants, light, radiation, or the like. Also, the hermeticity so obtained. Also, the process of conferring such hermeticity.
  • A material or device which serves to make a seal (1). Also, the hermeticity so conferred.
  • To affix a label or other binding which when broken evidences tampering. Also, such a label or binding.
  • To affix a label or other certificate which attests to the authenticity of something. Also, such a label.

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