Definition: The day immediately before today; one day ago.
Alright class, settle down now, let’s take a peek, At a simple word, surprisingly sleek! “Yesterday,” you see, is quite a delight, It means the day that vanished into night. The dictionary's right, it’s plain to view, "The day immediately before today," it’s true! Think of it this way, a little rhyme so sweet, It’s one day behind you, can’t be beat! Yesterday is gone, a memory bright, A moment passed, in the fading light. Do you understand? Any questions to share? Let's make sure we’ve got this knowledge rare!