Carrom Billards Pool Disc Ball Offline is a tabletop game origin in which players flick discs, attempting to knock them to the corners of the board. The game carrom is very commonly played by families, including children, and at social functions. Different standards and rules exist in different areas. Commonwealth during the early 20th century, the word carrom means to strike and rebound. The game is called Duboo Carrom and is played using small disks of wood or plastic known as carrom men (sometimes abbreviated CM). These pieces, aside from the special queen, may also be known as seeds, coins, pawns (as in chess), or pucks. Carrom men are designed to slide when struck and are made with a smooth surface that slides easily when laid flat on the board. They are struck by a Striker of a standard specification which is larger and heavier. Carrom follows similar "strike and pocket" games, like pool, with its use of rebounds, angles, and obstruction of the opponent's carrom pieces.

A carrom set contains 19 pieces (striker not included) in three distinct colors: one for each player, and another for the queen. The usual colors are white (or unstained) black for the players and red for the queen.

A successful pot entitles the player to shoot again. This means that, as in pool and snooker, it is possible for a player to pot all his/her pieces and cover the queen from the start of the game without the opponent being given the chance to shoot.

Any player pocketing the queen is required to cover it immediately by pocketing one of their carrom men on the entitlement shot. If after potting the queen the player fails to cover it, then the queen is returned to the center of the table. It is illegal to pot the Queen after the last piece since the Queen must always be covered.

Thumping is allowed by International Carrom Federation which allows the player to shoot with any finger including the thumb (known as "thumbing", "thumbshot", or "thumb hit").

Crossing the diagonal lines on the board by coming in touch with it, and pocketing the striker is a foul. A player needs to ensure that his striking hand does not infringe/cross the diagonal lines aerially/physically. A player committing a foul must return one carrom man who was already pocketed.
If a player pockets his striker, he has to pay a penalty. This penalty is usually 10 points.

Carrom boards are available in various board sizes and corner-pocket sizes. There are smaller boards and boards with larger pockets. Boards with larger pockets are used by beginners for easier gameplay. On traditional carrom boards, the corner pockets are only slightly larger than the carrom men but smaller than the striker. On boards with larger pockets, it is possible to pocket the striker, resulting in a "scratch shot" as in the pool. This results in a "due". On a due, the player has to return one previously pocketed carrom man to the board. The standardised association and federation size is a 74 × 74 cm square playing surface with 5–10 cm (2–4 in) borders. Other play-area sizes are not used in tournaments and competitions.