An uncertainty, possibility, condition, doubt etc.
Although; used to introduce a concession.
Supposing that; given that; supposing it is the case that.
Supposing that; used with past or past perfect subjunctive indicating that the condition is closed.
Supposing that, assuming that, in the circumstances that; used to introduce a condition or choice.
Whether; used to introduce a noun clause, an indirect question, that functions as the direct object of certain verbs.
Even if; even in the circumstances that.
In the event that a statement is true (a programming statement that acts in a similar manner).
Introducing a relevance conditional.
Something that is required as necessary or indispensable, or as a prior condition of something else.
In education, a course or topic that must be completed before another course or topic can be started. May be colloquially referred to as a prereq.
Required as a prior condition of something else; necessary or indispensable.