
der Flügel
wing
The body part with which birds, insects, or bats fly.
Der Adler breitete seine mächtigen Flügel aus und erhob sich in die Luft.
The eagle spread its powerful wings and rose into the air.
wing / grand piano
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wing
The body part with which birds, insects, or bats fly.
Der Adler breitete seine mächtigen Flügel aus und erhob sich in die Luft.
The eagle spread its powerful wings and rose into the air.

wing
The lateral supporting surface of an airplane.
Durch das Fenster konnte man die Turbine am Flügel des Flugzeugs sehen.
Through the window, you could see the turbine on the wing of the airplane.

wing
A side section of a building that extends out from the main part.
Die Büros der Verwaltung befinden sich im Westflügel des Schlosses.
The administration offices are located in the west wing of the castle.

grand piano
A large keyboard instrument in which the strings are stretched horizontally inside a wing-shaped body; a concert piano.
Die Pianistin spielte die Sonate auf einem großen, schwarzen Flügel.
The pianist played the sonata on a large black grand piano.

wing
A particular political or ideological current within a party or organization.
Der konservative Flügel der Partei stimmte gegen den Vorschlag.
The conservative wing of the party voted against the proposal.

wing
The side area of a playing field, especially in soccer, handball, or ice hockey.
Der Stürmer lief über den linken Flügel und flankte den Ball in die Mitte.
The striker ran down the left wing and crossed the ball into the middle.

casement / leaf
One of the movable parts of a door, window, or gate that consists of several parts.
Bitte schließe beide Flügel des Fensters, es zieht.
Please close both casements of the window; there's a draft.
Almost all meanings of 'Flügel' (wing) are based on the idea of a side part that extends from a central body. This idea connects the wing of a bird, an airplane, a building, and even a political party.
Der Vogel verletzt sich am Flügel und kann nicht mehr fliegen.
The bird injures its wing and can no longer fly.
The context makes the meaning clear. Verbs like 'fliegen' (to fly) or 'schlagen' (to beat/flap) point to animals or airplanes. Words like 'Gebäude' (building) or 'Schloss' (castle) point to architecture, and 'Partei' (party) to politics.
Der Vogel schlägt mit den Flügeln.
The bird flaps its wings.
When referring to an animal's wing, the typical verbs are 'mit den Flügeln schlagen' (to flap one's wings) and 'die Flügel ausbreiten' (to spread one's wings).
Der Schmetterling schlug sanft mit seinen bunten Flügeln.
The butterfly gently flapped its colorful wings.
For buildings, 'Flügel' (wing) is often combined with a compass direction to name a specific part. Typical examples are 'Nordflügel' (north wing), 'Südflügel' (south wing), 'Ostflügel' (east wing), and 'Westflügel' (west wing).
Die Ausstellung befindet sich im Ostflügel des Museums.
The exhibition is located in the east wing of the museum.
You can recognize the meaning 'Klavier' (piano) from verbs like 'spielen' (to play) or nouns like 'Konzert' (concert), 'Pianist' (pianist), or 'Tasten' (keys). The instrument is called this because its shape resembles a spread wing.
Er setzte sich an den Flügel und begann zu spielen.
He sat down at the grand piano and began to play.
In politics, 'Flügel' (wing) is almost always combined with a direction. People speak of the 'linken Flügel' (left wing), 'rechten Flügel' (right wing), or 'liberalen/konservativen Flügel' (liberal/conservative wing) of a party.
Der rechte Flügel der Fraktion lehnte den Kompromiss ab.
The right wing of the parliamentary group rejected the compromise.
In sports, especially soccer, 'Flügel' (wing) refers to the outside areas of the field. People often speak of the 'linken' (left) or 'rechten Flügel' (right wing) and of 'Flügelspielern' (wingers).
Der Angriff erfolgte über den rechten Flügel.
The attack came down the right wing.
faction
Here, a Fraktion is a recognizable group within a larger organization whose members act together. A Flügel refers more to a political or ideological tendency within the organization. Fraktion is the right term for a specific group, while Flügel is more appropriate for a current such as the left or right wing.

Der linke Flügel der Partei kritisierte den Vorschlag aus ideologischen Gründen.
The left wing of the party criticized the proposal for ideological reasons.
In der Partei bildete sich eine kleine Fraktion, die gemeinsam gegen den Vorschlag stimmte.
A small faction formed within the party and voted together against the proposal.