noun
control, check, inspection
B1
Control/check/inspection: Kontrolle means control, a check or inspection. Feminine noun (die Kontrolle). Plural: die Kontrollen. Used both as abstract 'control' (Kontrolle über etwas) and concrete 'inspection' (eine Kontrolle durchführen). Genitive plural/ singular follow regular declension. No irregular plural. Common in administrative and security contexts.
Examples
Der Inspektor führte die Kontrolle durch, weil vorher Hinweise auf Mängel eingingen.
The inspector carried out the inspection because reports of defects had come in beforehand.
Bei der Kontrolle wurde festgestellt, dass sein Ticket ungültig war.
The inspection revealed that his ticket was invalid.
Die Kontrolle am Flughafen dauerte lange.
The security check at the airport took a long time.
Details
Mnemonics
A clipboard with checkboxes and a stamp 'OK'.
Like English 'control' — Kontrolle sounds very similar.
die = many -e ending nouns are feminine; imagine 'die Kontrolle' as the official 'check'
Notes
Kontrolle is used in many contexts: security checks, quality control, administrative checks. Compound forms (e.g., Sicherheitskontrolle, Qualitätskontrolle) are common.