Register is the level of formality of your language. It is part of diction, fitted to the audience: a text to a friend, an email to a teacher and a letter to the city council call for different registers.
| Signal | Informal | Formal |
|---|---|---|
| Contractions | can’t, won’t, it’s | cannot, will not, it is |
| Slang and casual words | super chill, a ton of, kids | calm, many, children (or students) |
| Person | you (meaning anyone) | one, a student, people |
| Sentence forms | fragments, exclamations, emoji | complete sentences, steady tone |
Key idea
Match the register to the audience and occasion, and keep it steady. Formal doesn’t mean fancy: clear, plain words in complete sentences are formal enough for almost any reader.
Why it works
Register signals respect and seriousness. Slang in a letter to the council suggests you aren’t taking the request seriously; stiff, fancy language to a friend sounds cold. A sudden shift in register (a slang word in a formal essay) jars the reader out of the argument.
Worked example: From stuffy to formal and clear
Revise: “It is to be hoped that consideration will be given by the board to the utilization of the facility on Sundays.”
- The sentence is stiff: passive voice, abstract nouns (consideration, utilization), and no clear doer.
- Formal doesn’t require any of that. Name the doer and use plain verbs.
Answer: “I hope the board will consider opening the library on Sundays.”
Worked example: Too casual for the occasion
An email to a principal: “Hey! So the late bus is like super packed lol, can u fix it?”
- Greeting, slang (super packed, lol), a texting spelling (u) and a demand.
- Formal and clear: a greeting, a complete sentence about the problem, a polite request.
Answer: “Dear Ms. Patel, the late bus has been full most days this month. Could the school add a second one?”
Common mistake
Thinking formal writing means long words and the passive voice. That produces stiff prose that is harder to read, not more serious. Contractions are a judgment call: many teachers ask you to avoid them in academic essays, and they are fine in most other writing, including much published prose. Check: would a respected adult reader find this both clear and respectful?