topresponsibility

noun
UK /ˌtɒp rɪˌspɒnsəˈbɪləti/
US /ˌtɑːp rɪˌspɑːnsəˈbɪləti/

The most important job you have to take care of.

Feeding the class pet is my topresponsibility this week.


OTHER MEANINGS

2. The biggest thing you must be trusted to do.

Keeping the baby safe is her topresponsibility at home.

3. The first job on your list that matters most.

Finishing homework is his topresponsibility before playing games.

4. The main thing a leader must look after.

Making fair rules is the captain's topresponsibility.