Definition: (not used in the plural) The person or thing in the fourth position.
Alright class, settle down and let’s take a peek, At this word "fourth," so simple and sleek! The dictionary tells us, clear as can be, “Not used in the plural,” you see. It means the one that's fourth in line, Like numbers counting, truly divine! Think of a race with runners four, The fourth one crosses – wanting more! Or maybe books on shelves so tall, The fourth book’s waiting for you to call. It’s about order , a specific place, The fourth position, with elegant grace! Do you understand now, bright and keen? “Fourth” just means the number four, it's seen! Now let’s move on... any questions for me?