What does peekaboo mean?
Peekaboo is a playful word associated with a children's game in which a person hides and then unexpectedly appears, usually saying “peekaboo” as they emerge. It can also serve as an exclamation of teasing or mock surprise, as when someone pops out from behind a door. The word has a warm, nostalgic tone and is often used affectionately when describing games with babies and young children. Beyond this nursery context, “peekaboo” may suggest anything that appears briefly or unexpectedly, though such broader use is informal and often humorous. The familiar expression is especially common in British and American English and can be spelled “peek-a-boo” or “peekaboo.” Its simple sound and association with early childhood make it especially memorable in conversation, writing about family life, and children’s literature.
A children's game in which a person hides and suddenly appears, often saying “peekaboo” to announce their return.
"The baby shrieked with laughter during another round of peekaboo."
Usually treated as an uncountable name for the game, though “peekaboos” is possible in contexts requiring a plural.
An exclamation used to announce a playful or unexpected appearance.
"“Peekaboo!” cried Mia, jumping out from behind the sofa."
Informal and commonly associated with teasing, family interaction, and young children.
Rarely pluralized; the game is normally referred to in the singular or as “playing peekaboo.”
"The entertainer staged a series of playful peekaboos for the audience."
One word captures a baby's first favourite game: someone disappears, announces their return, and suddenly reappears.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does peekaboo come from?
Peekaboo developed during the 19th century as a name for a children's hiding game and as the utterance accompanying a player's sudden appearance. The form combines “peek” with “boo,” using reduplication and a familiar interjection to create a nursery expression. Its exact earliest wording and development are less certain than its well-established association with children’s games.
How peekaboo is actually used
The expression is especially associated with play involving young children and is normally friendly and humorous. It is also commonly written as “peek-a-boo” or “peekaboo.”
Easily confused with peekaboo
“Peek” means to look briefly or partly through a gap or from concealment, whereas “peekaboo” names the game or exclamation involving an unexpected appearance.