Definitions:

1. Enter someone else's territory and take spoils. VERB
   • The expedition was a dangerous foray into uncharted territory.
2. To make a brief or initial attempt or venture into something new, often with the implication of exploration or experimentation. VERB
   • The musician's foray into experimental electronic music was met with critical acclaim.
3. Trying out or testing something unfamiliar, whether it's a new activity, field of study, or area of interest. VERB
   • After years of working in finance, she decided to make a foray into the world of entrepreneurship and start her own business.

Synonyms:

• attack
• delve into
• invade
• probe into
• raid
• venture into