interpolation

mastery
UK /ɪnˌtɜː.pəˈleɪʃən/ US /ɪnˌtɝ.pəˈleɪʃən/noun

card 1 of 9 · synonym

Which word is closest in meaning to 'interpolation' in this sentence?

Today a widely established convention encloses all editorial interpolations in square brackets [like so] for clarity.