a flat piece of material, especially one that is hinged or attached on one side, used to cover or close an opening, the movement of a bird's wings when it is flying or preparing to fly, a type of control surface on an aircraft that is used to increase or decrease lift and drag

flip one's lid/flap, have a flap, on the flap

Formal and Informal Expressions of flaps

In different contexts, you can replace 'flaps' with suitable alternatives. In a more formal setting, 'cover, control surface' is apt. In informal speech or writing, 'thing' is a commonplace synonym.

flaps: Explore its Definition & Usage

flaps Definition

1a flat piece of material, especially one that is hinged or attached on one side, used to cover or close an opening
2the movement of a bird's wings when it is flying or preparing to fly
3a type of control surface on an aircraft that is used to increase or decrease lift and drag

Using flaps: Examples

Take a moment to familiarize yourself with how "flaps" can be used in various situations through the following examples!

Example
The flaps on the envelope kept the contents secure.
Example
The bird took off with a few quick flaps of its wings.
Example
The pilot extended the flaps to prepare for landing.
Example
The flaps on the back of the airplane moved up and down to control its altitude.

flaps Synonyms and Antonyms

Synonyms for flaps

cover
lid
door
wingbeat
flutter
control surface

Phrases with flaps

flip one's lid/flap
to become very angry or excited
Example
When he saw the mess in the kitchen, he flipped his lid and started yelling at everyone.
have a flap
to be worried or anxious about something
Example
She's having a flap about the exam tomorrow.
on the flap
in motion or active
Example
The company is on the flap to find a new CEO.

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Summary: flaps in Brief

The term 'flaps' [flæps] refers to a flat piece of material used to cover or close an opening, the movement of a bird's wings, or a type of control surface on an aircraft. Examples include 'The flaps on the envelope kept the contents secure.' and 'The pilot extended the flaps to prepare for landing.' Phrases like 'flip one's lid/flap' denote becoming very angry or excited, while 'have a flap' means being worried or anxious about something.