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to move with a rapid up-and-down motion
(of a bird) to rhythmically move its wings in an upward and downward motion, either during flight or in preparation for taking flight
to express agitation, make a fuss, or become overly concerned or worked up about something
to move an object or a part of it up and down or to and fro in a rapid or rhythmic manner
to move one’s arms about in a clumsy or uncontrolled manner while surfing, often due to panic or lack of balance
Informal
Specializeda broad, thin, and flexible piece attached at one edge, allowing it to hang loosely or move freely
a hinged surface on an aircraft wing that can be adjusted to increase lift or drag
a section of tissue that remains partially attached to the body, allowing it to be repositioned or used in surgical repair
the movement produced by something beating or moving up and down
a state of agitation, confusion, or emotional excitement
the folded extension of a book cover that wraps around the page edges to provide protection
What is a "flap"?
A flap is a portion of the cover or dust jacket that extends beyond the edges of the book's pages. It is typically used to hold additional information, such as a synopsis, author biography, or promotional details. Flaps can also help protect the book's cover by folding over and tucking into the book, securing it in place. This feature is common on hardcover books and dust jackets, adding both functional and decorative elements to the book's design.
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