spanning or extending throughout the entire world
"worldwide distribution"
"a worldwide epidemic"
involving the entire earth; not limited or provincial in scope
"global war"
"global monetary policy"
"neither national nor continental but planetary"
"a world crisis"
"of worldwide significance"
of worldwide scope or applicability
"an issue of cosmopolitan import"
"the shrewdest political and ecumenical comment of our time"
"universal experience"
Spanning the world; global.
"The new smartphone has achieved worldwide success, selling millions of units in every continent within its first year."
In plain English: Worldwide means happening everywhere on Earth at the same time.
"The new smartphone is now available worldwide."
Usage: Use worldwide to describe something that spans or covers an entire country, region, or planet without exception. It functions as both an adjective and an adverb but never requires a preposition like "in" before it when modifying a noun directly.
Throughout the world.
"The new music video has gone viral worldwide, gaining millions of views in just two days."
In plain English: It means something happens everywhere across the entire planet at the same time.
"The new technology has become popular worldwide."
The word worldwide is a compound formed by combining world with the suffix -wide. It was first used to describe something that extends across or involves the entire globe.