noun. ['ˌɪnˈtruːʒən'] any entry into an area not previously occupied.
noun. ['ˌɪnˈtruːʒən'] entrance by force or without permission or welcome.
noun. ['ˌɪnˈtruːʒən'] rock produced by an intrusive process.
noun. ['ˌɪnˈtruːʒən'] entry to another's property without right or permission.