1. a word, phrase, or idiom adopted from a foreign language and used in another language
Usage: often used in linguistics and language studies
2. a foreign custom, practice, or manner; something characteristic of or originating from a foreign country
Usage: less common than sense 1

Examples

• The word 'café' is a foreignism borrowed from French into English.
• Linguists study foreignisms to understand how languages influence each other.
• Many foreignisms have become so common in English that speakers forget their foreign origins.
• The restaurant adopted several foreignisms in its menu descriptions.
• English contains numerous foreignisms from Latin, French, and German.