Many retirees embrace second childhoods, taking up hobbies and playful activities they had long forgotten.

During the emergency drill, the second officers checked all life jackets and confirmed the muster stations.

The second strings on the old mandolin needed replacement after years of play.

In many signaling pathways, second messengers amplify the initial hormonal signal to produce a rapid cellular response.

When the lead fell ill, the company had to hire second-rates to keep the show running.

The second girls in line received their certificates with shy smiles.

Teachers often ask students to write second conditionals to describe hypothetical scenarios.

They tried to second-act into the theater during the intermission, hoping no one would check their tickets.

The committee scheduled the second sessions for each working group to finalize their proposals.

My second aunts always sent me handwritten letters on my birthday.