Expressly means clearly and directly stated, leaving no room for doubt or confusion. When your teacher expressly forbids using calculators on a test, she doesn't hint or suggest: she states it plainly so everyone understands. When a sign expressly prohibits skateboarding in the parking lot, there's no guessing about whether it's allowed.

The word emphasizes that something was communicated on purpose and in specific terms. If your parents expressly tell you to be home by 6:00, they didn't vaguely mention dinner time: they gave you an exact instruction. A coach might expressly warn players not to practice certain moves without supervision, meaning she addressed that specific issue directly.

Expressly often appears in rules, instructions, and agreements where clarity matters. A library might lend you a book expressly for research purposes, making clear that you can't just keep it on your shelf at home. The opposite would be something implied or assumed rather than clearly stated. When something is done or said expressly, nobody can later claim they didn't understand or weren't told.