das Kilo
kilo
The colloquial short form of kilogram, a unit of measurement for mass equal to 1000 grams.
Ich hätte gerne ein Kilo Kartoffeln, bitte.
I'd like a kilo of potatoes, please.

kilo
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kilo
The colloquial short form of kilogram, a unit of measurement for mass equal to 1000 grams.
Ich hätte gerne ein Kilo Kartoffeln, bitte.
I'd like a kilo of potatoes, please.

'Kilo' is the common short form of 'Kilogramm' (kilogram). The word element 'Kilo-' comes from Greek and means 'thousand', so one thousand grams.
Ein Kilo entspricht eintausend Gramm.
One kilo is equal to one thousand grams.
When 'Kilo' is used as a unit of measurement with a number greater than one, it usually stays singular in German. You say 'zwei Kilo Äpfel' (two kilos of apples), not 'zwei Kilos Äpfel'.
Für das Rezept brauche ich drei Kilo Mehl.
For the recipe, I need three kilos of flour.
The meaning 'one thousand euros' is pure jargon and very colloquial. Use this expression only when you are sure the person you are talking to understands it, since it is not generally known.
Er hat für die Uhr angeblich zwei Kilo bezahlt.
He supposedly paid two grand for the watch.
pound
'das Kilo' and 'das Pfund' are both units of weight and often come up when shopping. 'Kilo' is the short form of 'Kilogramm' and means 1000 grams. 'Pfund' usually means 500 grams in Germany, so half a kilo. The words can be confused because both are used to state quantities of food. The amount is what matters: one kilo is twice as much as one 'Pfund'.

Auf dem Markt kauft Maria ein Kilo Äpfel für den Kuchen.
At the market, Maria buys a kilo of apples for the cake.
Im Supermarkt nimmt er ein Pfund Kaffee aus dem Regal.
At the supermarket, he takes a pound of coffee from the shelf.