As the name implies, a full-round action takes a character her entire round to perform. If a character declares she is using a full-round action, it uses up all of her actions until the start of her next turn. Any effects from the action being performed occur at the end of her current turn, however.
Once a full-round action is declared, a character may not perform any standard, move, swift, or immediate actions, nor may she perform any attacks of opportunity until the start of her next turn.
Some common uses for a full-round action include:
- Delivering a coup-de-grace
- Escape from a net
- Loading a heavy crossbow or hand onager
- Using a touch spell on up to six adjacent allies