Grammatici certant - The grammarians are arguing (Horace - Ars Poetica 78)
Grandes Litteras - Big letters
Grata superveniet, quae non sperabitur, hora! - Welcome will arrive, at the hour that was not hoped for (Horace)
Gratia dei - Glory of God (Motto of the Belloch family)
Gratia non tollit naturam sed perficit - Grace does not take away nature but perfects it. (Saint Thomas Aquinas - Summa Theologiae I)
Gratia plena - Full of grace
Gratias agere - To give thanks ((Ecclesiastical term)
Gratis data - Given for free (Legal term)
Gratis et Amore - Free (of charge) and love
Gratis pro Deo - Free (of charge) by God
Gravia onera sunt pauperas et senectus - The heavy loads are poverty and old age
Gravis ira regum est semper - The grave anger of kings is forever.
Grecia capta ferum captorem cepit - The Conquered Greece conquered the fierce conqueror
Grosso modo - Gross way (roughly)
Gutta cavat lapidem, non vi sed saepe cadendo - The drop hollows out the stone by frequent dropping, not by force (Ovid)
Habeas Corpus ad subjiciendum - You should have the body for submitting (Legal term - The right of the prisoner to go to court)
Habeas Data - You should have the data (Legal term - Laws related to privacy and security of data)
Habent sua fata libelli - Books have their fate
Habeo conscientiam nitidam est habeo non bonam memoriam - Having a clear conscience is to have bad memory
Habere facias possessionem - That you cause to have possession (Legal term - Action taken to have possession of a property)
Habet bovem in lingua - Has a bull in his tongue (Rome had a coin with a bull on it. Bribed judges had a "bull" (coin) in their tongue.
Hac hoc ergo protect hoc - This is therefore protect this
Hac sunt in fossa Bedae Venerabilis ossa - In this tomb lie the remains of the Venerable Bede (Epitaph on the tomb of St Bede )
Haec aqua bendita sit nobis salus et vita - Let this holy water bless us with health and life (Ecclesiastical term - Used when crossing themselves with holy water)
Haec ego non multis (scribo), sed tibi: satis enim magnum alter alteri theatrum sumus - I am writing this not to many, but to you: certainly we are a great enough audience for each other (Epicurus)