aufeinanderfolgend
consecutive
In an uninterrupted sequence; coming directly one after another.
Das Team hat an drei aufeinanderfolgenden Wochenenden gewonnen.
The team won on three consecutive weekends.

consecutive
Loading your saved state.
consecutive
In an uninterrupted sequence; coming directly one after another.
Das Team hat an drei aufeinanderfolgenden Wochenenden gewonnen.
The team won on three consecutive weekends.

The word is made up of three parts: 'auf' + 'einander' + 'folgend'. So it literally means 'following one another' and is always written as one single word.
Die beiden Termine sind aufeinanderfolgend, wir haben keine Pause dazwischen.
The two appointments are consecutive; we have no break in between.
As an adjective, 'aufeinanderfolgend' (consecutive) stands before a noun and is declined like any other adjective. It describes an uninterrupted series.
Wir haben zwei aufeinanderfolgende Feiertage im Mai.
We have two consecutive public holidays in May.
This adjective is especially often combined with units of time or countable events. Typical examples are 'aufeinanderfolgende Tage' (consecutive days), 'Wochenenden' (weekends), 'Jahre' (years), or 'Generationen' (generations).
An zwei aufeinanderfolgenden Tagen fiel der Strom aus.
The power went out on two consecutive days.
simultaneously / at the same time
'gleichzeitig' and 'aufeinanderfolgend' both describe how events relate to each other in time. But they are opposites. 'gleichzeitig' means that things happen at the same moment. 'aufeinanderfolgend' means that things come one after another, often directly and in a fixed order. They can be confused because both occur in contexts involving schedules and processes. A simple question helps: if it happens together, use 'gleichzeitig'. If first one thing happens and then the next, use 'aufeinanderfolgend'.

Wir haben morgen drei aufeinanderfolgende Termine ohne Pause.
Tomorrow we have three consecutive appointments without a break.
Die Gäste kamen fast gleichzeitig im Restaurant an.
The guests arrived at the restaurant almost at the same time.