transcription, транскрипция: [ intransitive verb ]
Date: 1868
1. : to take part in or be present at a session of music or discussion as a visitor — often used with on
invited to sit in on a rehearsal
2. : to participate in a sit-in
SIT IN
Meaning of SIT IN in English
Merriam-Webster's Collegiate English vocabulary. Энциклопедический словарь английского языка Merriam Webster. 2003