Alexander Adam was born near Forres, in Moray. From his earliest years he showed uncommon diligence and perseverance in classical studies, notwithstanding many difficulties and privations. In 1757 he went to Edinburgh, where he studied at the university. His reputation as a classical scholar secured him a post as assistant at Watson's Hospital and the headmastership in 1761.
In 1764 he became private tutor to Alexander Kincaid, afterwards Lord Provost of Edinburgh, by whose influence he was appointed in 1768 to the rectorship of the High School on the retirement of Mr Matheson, whose substitute he had been for some time before. From this period he devoted himself entirely to the duties of his office and to the preparation of his numerous works on classical literature. His popularity and his success as a teacher are strikingly illustrated by the great increase in the number of his pupils, many of whom subsequently became distinguished men, among them being Walter Scott, Lord Brougham and Francis Jeffrey.
He succeeded in introducing the study of Greek into the curriculum of the school, notwithstanding the opposition of the university headed by Principal William Robertson. In 1780 the University of Edinburgh conferred upon him the honorary degree of Doctor of Laws.
He died after an illness of five days, during which he occasionally imagined himself still at work, his last words being, "It grows dark, boys, you may go".
- Principles of Latin and English Grammar (1772) (co-written with Andrew Dalzell), which, being written in English instead of Latin, brought down a storm of abuse upon him.
- Roman Antiquities (1791) — his best work, which passed through a large number of editions and received the unusual compliment of a German translation.
- Summary of Geography and History (1794)
- Compendious Dictionary of the Latin Tongue (1805)
The manuscript of a projected larger Latin dictionary, which he did not live to complete, lies in the library of the High School.
Adam married first, in 1775, Agnes Munro, whose father was minister of Kinloss; and second, in 1780, Jean Cosser, a daughter of the controller of excise in Edinburgh.
- One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Adam, Alexander". Encyclopædia Britannica. 1 (11th ed.). Cambridge University Press. p. 171. This cites An Account of the Life and Character of A. A., by A. Henderson (1810).
- Oxford Dictionary of National Biography: Andrew Dalzell
- Paul 1885, p. 85.
- This article incorporates text from a publication now in the public domain: Paul, James Balfour (1885). "Adam, Alexander". In Stephen, Leslie. Dictionary of National Biography. 1. London: Smith, Elder & Co. pp. 84, 85.
- Chambers, Robert & Thomson, Thomas Napier (1857). Adam, Alexander. A biographical dictionary of eminent Scotsmen. 1. Glasgow: Blackie and son. pp. 16–18.
- Henderson, Alexander (1810). An Account of the Life and Character of Alexander Adam, LL.D., Rector of the High School of Edinburgh. Edinburgh: D. Schaw.