A "contract" is a wrapper around a smart contract that is deployed on a chain. It is what you use to create transactions and read contract state.

import { getContract } from "thirdweb";
// get a contract
const contract = getContract({
  // the client you have created via `createClient()`
  client,
  // the contract's address
  address: "0x123...",
  // the chain id
  chainId: 1,
  // OPTIONAL: the contract's abi
  abi: [...],
});