If something is secund, it is not as important as something else. It is second in importance or order.
Being secund can make something feel less special or less good.
Examples:
The secund prize is not as good as the first prize.
She is secund in line to the throne.
The secund book in the series is my favorite.
I like the secund flavor of ice cream better.
In the race, I came secund, not first.
The secund day of the week is Tuesday.