PFLs

PFLs is a multi-use acronym that can denote several different things depending on the field and context. As the plural form of PFL, it refers to multiple entities that share the same initials.

In sports, notable PFLs include the Professional Fighters League, a United States–based mixed martial arts promotion established in 2018, and the Philippine Football League, the Philippines’ top-tier football league since 2017.

In science and technology, PFL is sometimes used to refer to a passively mode-locked fiber laser, a type of ultrafast laser that achieves short pulses through passive saturable absorption rather than active modulation.

Because PFLs span multiple domains, the intended meaning is typically clarified by the surrounding text or by a defined acronym list. There is no single universally dominant definition, so audiences should rely on context to determine which PFL is being referenced.