solidagreement

noun
UK /ˈsɒlɪd əˈɡriːmənt/
US /ˈsɑːlɪd əˈɡriːmənt/

A solid agreement is a promise that everyone really means and will keep.

The two friends made a solid agreement to share their toys every day.


OTHER MEANINGS

2. A formal arrangement between groups that is strong and unlikely to break.

The two countries signed a solid agreement to keep peace.

3. A shared decision that everyone fully supports.

The team reached a solid agreement about the new rules.

4. A reliable understanding between people based on trust.

Their solid agreement meant neither of them ever broke a promise.