A chord, (pronounced 'cord') is formed by playing 2 or more notes simultaneously.?

As an example try playing a chord by placing finger 3 on the 4th string, 3rd fret which is F.? Now place finger 2 on the 3rd string, 2nd fret which is note A.? Now place finger 1 on the 2nd string, 1st fret which is note C.?? Now play the 3 notes F, A, C all together and you have a chord.? You are sounding more than two notes and you are playing them all together.? A chord can have 2, 3, 4 or even the full 6 notes in it but 3 and 4 notes are still chords.?

In written music the 3 notes would be written one on top of the other in a vertical line to indicate that they are all sounded together rather than one after the other.?

By taking any note and adding 2 or 3 other notes you can form a chord.? There are many different types of chord.? For instance you could take the note C (2nd string 1st fret) and add the extra notes G and E (the 3rd and 1st strings played open) to form one chord or take the note C again and add the extra notes F and A to form a completely different chord.? Try these two examples and the difference will be obvious to you.