Hypertext Webster Gateway: "unstable"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Unstable \Un*sta"ble\, a. [Cf. {Instable}.]
Not stable; not firm, fixed, or constant; subject to change
or overthrow. -- {Un*sta"ble*ness}, n. Chaucer.
{Unstable equilibrium}. See {Stable equilibrium}, under
{Stable}.
From WordNet (r) 1.7 (wn)
unstable
adj 1: lacking stability or fixity or firmness; "unstable political
conditions"; "the tower proved to be unstable in the
high wind"; "an unstable world economy" [ant: {stable}]
2: highly or violently reactive; "sensitive and highly unstable
compounds"
3: affording no ease or reassurance; "a precarious truce" [syn:
{precarious}]
4: suffering from severe mental illness; "of unsound mind"
[syn: {mentally ill}, {unsound}]
5: disposed to psychological variability; "his rather unstable
religious convictions"
6: subject to change; variable; "a fluid situation fraught with
uncertainty"; "everything was unstable following the coup
[syn: {fluid}]
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