1. the phase, the cadence, the beat, the stroke, the meter (The core idea is that the Takt defines the rhythmical structure of a repetitive process. That can be music, a car engine, an electric current or a processor. It's NOT used for slow stuff like natural cycles or so.)
2. the bar (In music, besides the meter, a Takt is also one bar of notes.)
3. the tact (In the sense of proper behavior.)