If you say that something is ~, you mean that it is average in quality, rather than being very good or very bad. (INFORMAL)
Their lunch was only ~...
= average
ADJ
If you say that something is ~, you mean that it is average in quality, rather than being very good or very bad. (INFORMAL)
Their lunch was only ~...
= average
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012