initiator

Definitions

A person or thing that introduces or starts a process, project, or action.

A substance or agent that starts a chemical reaction, such as polymerization.

A person who initiates others into a group or organization.

Examples

The initiator of the project presented a detailed plan to the board of directors.

He acted as the primary initiator of the peace talks between the two warring nations.

As the initiator of the conversation, she felt responsible for keeping the discussion productive.

Synonyms

originator pioneer founder instigator creator architect author

Antonyms

follower imitator finisher concluder terminator executor successor