Teaching and learning have become hollow, desperate acts punctuated by recess, lunch, and homecoming.

NPR: Seeking Solutions for the Nation's Broken Schools

Intimacy with Black Friday has become hollow.

NPR: Excerpt: 'The Mysterious Secret of the Valuable Treasure'

The argument that Parliament has become ineffectual must have a hollow ring to government ministers.

ECONOMIST: Bagehot

Our health-care system has become impersonal, mechanized, and hollow, and it has failed millions of people, many of whom want to find a way to regain control of their own medical decisions.

NEWYORKER: The Operator

Quite how hollow such deals really were has now become obvious.

ECONOMIST: Paper lions

Ms Van Biezen thinks that as parties hollow out, celebrity and dynastic politicians may become more prevalent.

ECONOMIST: Political parties: Lonely at the top | The

The oak - which had a huge hollow trunk said to big enough to seat six people at a table - had become a local attraction for walkers and visitors in recent years.

BBC: Pontfadog Oak: 1,200-year-old tree toppled by winds