We may use some terms that are new to you. These words are explained in Definitions. Generally they are also explained in more detail in the section where they first appear.
While we have sometimes used the word 'bought' rather than 'acquired', you may have acquired an asset subject to capital gains tax (a CGT asset) without paying for it (for example, as a gift or through an inheritance). Similarly, we refer to 'selling' such an asset when you may have disposed of it in some other way (for example, by giving it away or transferring it to someone else). Whether by sale or by any other means, all of these disposals are CGT events.