To BRIDGE, is the process of transferring assets from one blockchain to another. This usually involves using a bridge platform that locks your tokens on the original blockchain and then issues a wrapped (or pegged) version of that asset on the destination blockchain.
As an example of this, you could use a bridge to transfer Ethereum (ETH) from the Ethereum network to Binance Smart Chain (BSC), where the bridge would lock the original ETH and release an equivalent amount of wrapped ETH (wETH) on BSC. Then, you would be able to SWAP wETH to another asset in the BSC blockchain.