verb (used with object)
- to increase in extent, size, volume, scope, etc.: Heat expands most metals. He hopes to expand his company.
- to spread or stretch out; unfold: A bird expands its wings.
- to express in fuller form or greater detail; develop: to expand a short story into a novel.
- to write (a mathematical expression) so as to show the products of its factors.Compare factor(def 10).
- to rewrite (a mathematical expression) as a sum, product, etc., of terms of a particular kind: to expand a function in a power series.
verb (used without object)
- to increase or grow in extent, bulk, scope, etc.: Most metals expand with heat. The mind expands with experience.
- to spread out; unfold; develop: The buds had not yet expanded.
- to express something more fully or in greater detail (usually followed by on or upon): to expand on a statement.
- to make or become greater in extent, volume, size, or scope; increase
- to spread out or be spread out; unfold; stretch out
- (intr often foll by on) to enlarge or expatiate on (a story, topic, etc) in detail
- (intr) to become increasingly relaxed, friendly, or talkative
- maths to express (a function or expression) as the sum or product of terms
vearly 15c., “spread out, spread flat,” from Anglo-French espaundre, Middle French espandre and directly from Latin expandere “to spread out, unfold, expand,” from ex- “out” (see ex-) + pandere “to spread, stretch” (see pace (n.)). Sense of “grow larger” first recorded 1640s. Related: Expanded; expanding.