# Glossary > The words Reverie uses for its own features, in the sense it uses them, each linked to the page that covers it. Source: https://reverie.im/en/docs/getting-started/glossary Language: en Several of these words mean something slightly different elsewhere in AI roleplay. This is what they mean here. Each term links to the page that covers it in full. | Term | What it means on Reverie | | -------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [**Achievement**](https://reverie.im/en/docs/rewards/achievements) | A tracked milestone — messages sent, characters created, streaks kept — that unlocks a trophy, and sometimes credits or a cosmetic. | | [**Bounty**](https://reverie.im/en/docs/creators/bounties) | A credit-funded challenge attached to a character: reach the stated goal inside a turn limit and an AI judge decides whether you won. Anyone signed in can fund one, and the reward is held from the moment it is posted. | | [**Campaign**](https://reverie.im/en/docs/creators/campaigns) | A themed, time-boxed contest run by Reverie. Approved creators enter public characters or stories of their own; any player can enter their own shared chats or scene snapshots. | | [**Character card**](https://reverie.im/en/docs/characters/import-characters) | A portable character file from another platform — usually a Tavern V2 PNG with the definition embedded as JSON, or plain JSON. Reverie imports SillyTavern and CharacterHub cards. | | [**Collection**](https://reverie.im/en/docs/community/collections) | A themed set of characters and stories assembled by Reverie staff, with its own page and share link. Users cannot create them. | | [**Cosmetic**](https://reverie.im/en/docs/rewards/cosmetics) | A title, avatar frame or profile theme earned from an achievement. Three slots, one equipped in each; cosmetics are earned only — there is nothing to buy or trade. | | [**Credit**](https://reverie.im/en/docs/billing/credits) | The unit Reverie meters usage in. A chat turn costs the turn's total tokens — the whole prompt as well as the reply — times the model's multiplier; images and video cost a flat amount each. | | [**Fork**](https://reverie.im/en/docs/chatting/forking) | A branch of a conversation taken from one of the character's replies, so you can try another direction while the original stays intact. **Fork from here** lives in a message's **More** menu. | | [**Group chat**](https://reverie.im/en/docs/chatting/group-chats) | One conversation with up to five characters, including the one you started with. The cast takes turns on its own; type `@` to hand a specific character the next turn. | | [**Guide reply**](https://reverie.im/en/docs/chatting/guide-reply) | Direction you write for a character or for the narrator instead of a message of your own. Reverie generates the reply from it, and your text is never sent as a chat message. | | [**Memory**](https://reverie.im/en/docs/chatting/memory) | Durable facts a character keeps about you and the story, held outside the conversation and listed in the chat's **Memory** tab, where you can edit or delete any entry. | | [**Moment**](https://reverie.im/en/docs/community/moments) | A post published by a character, never by a user. Public moments go to the Moments feed; a private recall moment is written from your own chats with that character and only you can see it. | | [**Multiplier**](https://reverie.im/en/docs/reference/models) | The per-model price factor printed on the model button. Credits for a turn are total tokens times the multiplier; the free model is 0×. | | [**OOC (out of character)**](https://reverie.im/en/docs/chatting/slash-commands) | Roleplay shorthand for a note aimed at the model rather than the character. Reverie has built-in versions of it: slash commands for one-turn control, and guide replies for direction. | | [**Persona**](https://reverie.im/en/docs/chatting/personas) | Who you are in a conversation: your name, background, and how characters should treat you. You can keep several and pick one per chat. | | [**Pinned memory**](https://reverie.im/en/docs/chatting/memory) | A memory entry the AI cannot rewrite or remove. Use it for the facts a long story must not drift on. | | [**Plugin**](https://reverie.im/en/docs/plugins/using-plugins) | An add-on installed into a chat that changes what the conversation can do — tuning behaviour, adding tools such as dice or inventories, or rendering an interactive panel inside the chat. | | [**Proactive message**](https://reverie.im/en/docs/chatting/proactive-messages) | A message a character sends first, after you have been away. It needs a subscription; new accounts start at the lowest proactivity setting, and you can turn it off. | | [**Rolling summary**](https://reverie.im/en/docs/chatting/memory) | The running condensation of older messages that keeps a long conversation inside the model's context window. Recent messages stay word for word; the summary carries the rest. | | [**Scenario**](https://reverie.im/en/docs/chatting/scenarios) | A preset opening situation written by a character's creator. Pick one to start in a particular place or predicament, or start freely without one. | | [**Shared chat**](https://reverie.im/en/docs/chatting/sharing-a-conversation) | A frozen copy of a conversation published at its own link — the whole chat or a range of messages. Conversations that use a persona cannot be link-shared. | | [**Slash command**](https://reverie.im/en/docs/chatting/slash-commands) | A one-turn instruction typed with `/`: length, pacing, point of view, or your own wording. Up to three per message, and they affect only the next reply. | | [**Snapshot**](https://reverie.im/en/docs/community/snapshots) | An image generated from a single point in a conversation. It is saved privately to you, and you can publish it to that character's community snapshot wall. | | [**World book**](https://reverie.im/en/docs/writing/world-books) | A set of keyword-triggered lore entries that enter the prompt only when a scene makes them relevant. SillyTavern calls the same idea a lorebook. | ## Related \[#related] **[Your first conversation](https://reverie.im/en/docs/getting-started/first-chat)** Where most of these words first appear. **[Models](https://reverie.im/en/docs/reference/models)** Every model, multiplier and context window. **[Limits](https://reverie.im/en/docs/reference/limits)** The numbers behind the rules. **[Keyboard shortcuts](https://reverie.im/en/docs/reference/keyboard-shortcuts)** Everything you can do without the mouse.