on cloud nine Definition

cloud
noun

1. meteorol.
A visible floating mass of small water droplets or ice crystals suspended in the atmosphere above the Earth's surface.
2. A visible mass of particles of dust or smoke in the atmosphere.

Thesaurus: fog, mist, haze, nebulosity, smoke, veil, film.
3. A dark or dull spot.

Thesaurus: spot, shadow, flaw, blemish, fault, obscurity, blotch, stain.
4. A circumstance that causes anxiety.
5. A state of gloom, depression or suspicion.

verb clouded, clouding

tr & intr
1. To make or become misty or cloudy.

Thesaurus: dim, obscure, eclipse, obfuscate, overshadow, dull, shadow, darken, shade, veil; Antonym: clear.
Form: cloud over (usually)
Form: cloud something over
intr
2. Said of the face: to develop a troubled expression.

Example: His face clouded at the terrible news
Form: cloud over (often)
3. To make dull or confused.

Thesaurus: distort, confuse, muddy, disorient, muddle.
4. To spoil or mar.

Thesaurus: depress, deject, sadden, discourage, mar, sully, taint, stain, smirch.

Derivative: cloudless
adj

Said especially of the sky: having no clouds; clear and bright.

Derivative: cloudlessly
adverb

Idiom: on cloud nine

colloq
Extremely happy.

Idiom: under a cloud

In trouble or disgrace.
Example: He left the firm under a cloud

Idiom: up in the clouds

colloq
Out of touch with reality.
Thesaurus: fanciful, fantastic, romantic.

Idiom: with one's head in the clouds

colloq
Preoccupied with one's own thoughts.

Etymology: Anglo-Saxon clud hill or mass of rock.

Phrasal Verb: cloud over

To become overcast with clouds.