(dated) Scutum, a constellation in the northern sky.

A human shield. / (video games) A so-called "tank" whose main purpose is to hold aggro from MOBs and absorb damage. / (video games) A stunned or dead enemy character used as a shield against attacks.

(volcanology) A large volcano, with shallow-sloping sides and a flattened dome, formed of successive eruptions of free-flowing lava from fissure vents.

A pad affixed temporarily to a dress or other garment, inside the armpit, to prevent the garment's becoming wet or soiled from perspiration.

An area of very old bedrock surrounding Hudson Bay, and covering about half the land area of Canada.

A pop filter.

(US, law) legislation designed to provide a news reporter with the right to refuse to testify as to information and/or sources of information obtained during the news gathering and dissemination process.

(historical) A decorated leather shield used by many North American native warriors, believed to protect its owner with its magic power.

Any of various laws barring a defendant on a criminal charge of rape from introducing evidence that goes to the alleged rape victim's sexual behavior unrelated to the encounter from which the charge arose.

(archaic, rare, nonstandard) A turtle or tortoise.