adjective
1. temperamentally disinclined to talk
• Syn: ↑untalkative
• Similar to: ↑taciturn
• Derivationally related forms: ↑reticence
2. cool and formal in manner
• Syn: ↑restrained, ↑unemotional
• Similar to: ↑undemonstrative
3. reluctant to draw attention to yourself
• Syn: ↑self-effacing, ↑retiring
• Similar to: ↑unassertive
Useful english dictionary. 2012.