New American Oxford Dictionary
undemonstrative
un de mon stra tive |ˌəndiˈmänstrətiv ˌəndəˈmɑnstrədɪv | ▶adjective (of a person ) not tending to express feelings, esp. of affection, openly: John is silent and undemonstrative, like Dad. DERIVATIVES un de mon stra tive ly adverb, un de mon stra tive ness noun
Oxford Dictionary
undemonstrative
un |demon ¦stra |tive |ʌndɪˈmɒnstrətɪv | ▶adjective (of a person ) not tending to express feelings, especially of affection, openly: the English are an undemonstrative lot. DERIVATIVES undemonstratively adverb, undemonstrativeness noun
Oxford Thesaurus
undemonstrative
undemonstrative adjective my grandmother was an undemonstrative woman: unemotional, unaffectionate, impassive, dispassionate; self-contained, restrained, reserved, unresponsive, unmoved, unloving, unfriendly, unfeeling, passionless, wooden, uncommunicative, unforthcoming, sober, stiff, reticent, guarded, secretive, close, taciturn, aloof, distant, detached, remote, withdrawn; cool, cold, cold-blooded, chilly, frosty, frigid, glacial; informal stand-offish, offish. ANTONYMS demonstrative, gushing.
Sanseido Wisdom Dictionary
undemonstrative
ù n de m ó n stra tive 形容詞 親愛の情を見せない, 内気な, 控えめな (reserved ).
The Wordsmith Dictionary