scenario meaning
EN
[sɛˈnɑːɹiəʊ] [sɪˈnɛəɹioʊ] [səˈneːɹiəʉ] 
US WScenario
- In the performing arts, a scenario (from Italian: that which is pinned to the scenery; pronounced [*ʃeˈnäːrjo]) is a synoptical collage of an event or series of actions and events.
- Surviving scenarios from the Renaissance contain little other than character names, brief descriptions of action, and references to specific lazzi with no further explanation.
- In the creation of an opera or ballet, a scenario is often developed initially to indicate how the original source, if any, is to be adapted and to summarize the aspects of character, staging, plot, etc.
FR scénario 
- NounPLscenarios
- An outline of the plot of a dramatic or literary work.
- A screenplay itself, or an outline or a treatment of it.
- An outline or model of an expected or supposed sequence of events.
- Hearts were keen to avoid a repeat of the scenario at this stage of last season's competition, when they found themselves two goals down inside the opening quarter of an hour.
- An outline of the plot of a dramatic or literary work.
- More Examples
- Used in the Middle of Sentence
- Warnock admitted it would be the ideal scenario if he received a Carling Cup winners' medal as well as an England call-up [ …] .
- President Bush laid out the scenario we face if the United States decides to cut and run.
- This pattern (i.e., old origin and more recent diversification) suggests a scenario of replacement in carnivory among polyneopterous insects.
- Used in the Middle of Sentence
Definition of scenario in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Countable nouns
- Countable nouns
- Nouns
- en scenarios
- en scenarioize
- en scenarioist
- en scenarioists
- en scenarioized
Source: Wiktionary
Grammatically, this word "scenario" is a noun, more specifically, a countable noun.