This paper examines recent lexical expansion in New Zealand Sign Language (NZSL) in the context of change in the status of the language and ongoing contact with other (spoken and signed) languages. We categorised 917 new signs documented in the past five years according to their source, semantic field, and sign formation mechanism(s), both language-internal and language-external (contact induced). Lexical expansion in NZSL uses known sign formation mechanisms with a high proportion of (iconic) depicting constructions but also a large number of contact-induced signs including loans, calques and bimodal loan-shifts. Differences were found between planned (curriculum-related) terminology and community generated neologisms both in semantic field and prevalence of sign formation mechanisms. Variation in neologisms and non-lexical paraphrases were common, suggesting that while the semiotic repertoires of signers are diversifying, acceptance and standardisation of neologisms are uncertain. Our findings indicate that lexical expansion reflects new contexts of NZSL use (including pressure to disseminate information through interpreting and translation, and use in education) and interaction with the culture of wider society.