1. To depart under the power of a steam engine. The pier was filled with friends and family members watching as their loved ones steamed off on the ship to America. The conductor gave one final blow of his whistle before the train steamed off from the station.

2. To leave or depart in a very angry and animated manner. After being told she couldn't watch any more television, the child threw down her toys and steamed off in a huff. I told Mark that we should break up, and he steamed off without a word.

3. To remove something (from something else) with the application of steam. In this usage, a noun or pronoun can be used between "steam" and "off." My grandmother was incredibly frugal. She even used to steam stamps off of letters so she could reuse them again. You have to steam these seals off if you don't want to damage the paper underneath.

4. To make one especially annoyed or irate. In this usage, a noun or pronoun can be used between "steam" and "off." As a doctor, it really steams me off when people start lecturing me on the medical benefits of some unproven pseudoscience or another. I think you steamed off the boss when you questioned his judgment in front of everyone at the meeting.