I. verb 1. change in character or composition, typically in a comparatively small but significant way[with obj.] • Eliot was persuaded to alter the passage
• [no obj.]
our outward appearance alters as we get older
• (as adj. altered)
an altered state.
2. [with obj.] — make structural changes to (a building) • plans to alter the dining hall.
3. [with obj.] —
(Austral.) castrate or spay (a domestic animal).
II. derivatives alterable /ˈɔːltərəb(ə)l, ˈɒltərəb(ə)l / adjective
– origin late Middle English: from Old French alterer, from late Latin alterare, from Latin alter ‘other’.