Wordwizard

Does 'to open a shirt' mean to unbutton it?
Does 'to close a shirt' mean to button it up?

If a man's shirt is unbuttoned and he pulls the two sides further apart, exposing his chest, how would one describe what he does? Does he open his shirt? Does he open it wider?

If a man's shirt is unbuttoned and he pulls the two sides closer together, how would one describe what he does? Does he close his shirt? Does it pull it together? Does he pull the sides of his shirt together?

Many thanks.

Does 'to open a shirt' mean to unbutton it? Yes
Does 'to close a shirt' mean to button it up? Not an expression I have ever heard

If a man's shirt is unbuttoned and he pulls the two sides further apart, exposing his chest, how would one describe what he does? Does he open his shirt? Does he open it wider? Yes

If a man's shirt is unbuttoned and he pulls the two sides closer together, how would one describe what he does? Does he close his shirt? Does he pull it together? Does he pull the sides of his shirt together? I would say, "pull it together"