[1] Deevy attended the Ursuline Convent in Waterford and in 1913, aged 19, she enrolled in University College Dublin, to become a teacher.

Many more followed in rapid succession, such as In Search of Valour, Temporal Powers, The King of Spain's Daughter and Katie Roche, the play she is perhaps best known for.

[8] Two of her plays were eventually broadcast on television by the BBC while they have also enjoyed several stage-revivals since her death, most recently by the Mint Theater Company in New York.

She was critical also of the Irish theater scene and especially of literary censorship, questioning the roles, rights, and power of the censor, and also how to remove them.

[7] Deevy enjoyed renewed interest in her work from the mid-1950s onwards after Irish poet John Jordan published a study of her plays in the University Review in 1956.

[7] Deevy returned to Waterford after the death of her sister Nell, with whom she had lived in Dublin and on whom she was very reliant as a lip-reading interpreter.

When her health began to fail she was eventually admitted to the Maypark Nursing Home in Waterford city and died[why?]

[10] Katie Roche, Temporal Powers, Wife to James Whelan and The Suitcase Under the Bed were staged and produced by Mint Theater Company in New York, under the "Teresa Deevy Project" that aims to acknowledge and honour what some describe as "One of Ireland’s best and most neglected dramatists.