0 Someone who is tight-lipped is pressing their lips together to avoid showing anger, or is refusing to speak about something: --
1 refusing to say very much about something: --
It was thought that the willie wagtail could steal a person's secrets while lingering around camps eavesdropping, so women would be tight-lipped in the presence of the willie wagtail.
He is often tight-lipped when the subject of fomicry comes up.
Over the next 14 years of development they established a tight-lipped culture, revealing little, if anything, between releases.
He was later recalled as handsome and confident, but criticised for appearing tight-lipped and clenched and providing long and convoluted answers to questions.
He is said to have no expressions other than a grim, tight-lipped look of domineering authority.
One minute joking and talkative, the next tight-lipped and silent.
She remains tight-lipped and won't even tell them her name.
He hinted at something big taking place in the future, but has since remained tight-lipped regarding the news.
