• Total S.A., based on its ticker symbol on the New York Stack Exchange
• Terms of trade, an economic term.
• Time on Target an artillery technique.
• Tip of the tongue a psychological phenomenon.
• Toddler, a small child
• Tower of Terror, an abbreviation for a Dreamworld attraction
• Tower of Terror, an abbreviation for a Disney theme park attraction.
• Tater Tots, a side-dish made from deep-fried, grated potatoes (aka Tater Tots)
• TOT (Thailand), Thai state-owned telecommunications firm, formerly known as the Telephone Organization of Thailand.
• Theatre of Tragedy a Norwegian metal band
• Train of Thought
• Trail of Tears
• Tales of the Tempest

It is also the German word for dead.

It is also used as an (East Asian) emoticon for loud crying.