The Word of the Day has been a recurring Sesame Street feature since the 38th season. The segment highlights a particular word introduced before the show with What's the Word on the Street? The standard format for every segment was established by Season 39, in that Muppet characters (usually Elmo) would accompany celebrities in explaining or demonstrating the word.
LL Cool J, Elmo and Abby Cadabby try to show "unanimous" by agreeing to go to somewhere, but Oscar intervenes and disagrees with them, making it not unanimous. They turn the tables on him by all agreeing to not go anywhere too, and then when Oscar changes his mind, they agree with him again.
Nancy O'Dell has a flower friend to help explain what pollinate means, but the flower has no idea what it means. A bee buzzing by to do his job helps out.
Elisabeth Hasselbeck wants to explain what camouflage means, but she can't find her frog assistant. She discovers he has been camouflaged the whole time.
Abby Cadabby tries helping Cedric the Entertainer show what a canteen is by making one appear, but instead conjures up a hose, a fish tank and a bucket. Exhausted, she takes a drink from her own canteen.
Judah Friedlander describes the word "spectacular," which happens to be on his hat. Telly come by and thinks his hat is spectacular, earning him a chance to wear it.
Amy Poehler tries to show what a challenge is by attempting to lift a cow in the air and spin it on her finger. When she can't do that, she tries the "Pat Your Head and Rub Your Tummy Challenge."
Jason Bateman tries to comfort someone to help explain the word's meaning, but no passing animal needs his help. Elmo finds Jason sad and comforts him himself.
Abby helps Rebecca Romijn show what accessories are by using magic, but gives her more than she needs. "You can never have too many accessories," Abby states.
Terrence Howard shows Elmo what incognito means, with visual aids from some disguised animals. Terrence then disguises himself as a certain red monster.
Elmo and Anna Faris try to talk about the word "gem," but are constantly interrupted by a prince, presenting "the gorgeous Honey-Bunny Ms. Anna" with various jewels.
Johnny Galecki and Abby explain what transform means by having Abby transform their pumpkin into a coach. The pumpkin doesn't transform, but Johnny is turned into a pumpkin.
Conan O'Brien talks about the word "amphibian," but hasn't brought any visual aids. Abby magically conjures up a toad and newt, before turning Conan into a frog. She changes him back, but finds a few side effects.
Murray Monster tries to provide John Krasinski with soggy items, but he brings a dry sock and sponge. Murray then brings in an elephant, who provides some water (all over John).
Abby Cadabby magically pulls Blake Griffin from his basketball game to talk about the word "champion." He faces against a chicken to be the chicken-call champion.
Zac Efron talks about the word "patience" while Elmo waits for him to finish so they can play basketball. They both end up waiting when the ball steps out for some air.
Supreme Court Justice Sonia Sotomayor explains to Abby what a "career" is, explaining that "princess" isn't one. Abby decides to be a justice like her.
Steve Carell, Abby and Elmo take a vote on what snack they should have - cheese or a peanut butter and jelly sandwich. When a third, pizza-party candidate enters the race, they all pick her.
Elmo comes up with some innovations to help Paula Patton explain the word. He first invents a "Word-O-Pad" that displays the word, then a Word-O-Bot, and finally makes himself into a robot that sings and dances.
Matt Kemp and Abby show "attach" using a sticker book and sippy cup. Abby wants to magically attach some numbers to his jersey, but instead attaches some stickers, sippy cups and even herself.
Elmo is busy making a visual aid for Jon Hamm's explanation on what a sculpture is, so he finds various ones of different materials (and increasing weights). Just before Jon gets a hernia, Elmo finishes his sculpture - a likeness of himself, which thanks Jon for his compliment.
Kellan Lutz shows Cookie Monster things that vibrate, though he would rather go out for cookies. Kellan pulls out his cell phone, which Cookie devours; it soon vibrates from within him.
Abby and Charlize Theron talk about the word jealous, a feeling Charlize claims to have never felt before. Soon, she becomes jealous of Abby's wings. Abby magically gives her some, and now Elmo becomes jealous of Charlize's wings!
Elmo and Troy Polamalu look for something with a pleasant fragrance. They smell a stinky skunk, onion and sweatsock before Elmo catches the pleasant aroma of Troy's conditioner.