I. ˈflü-əd adjective
Etymology: French or Latin; French fluide, from Latin fluidus, from fluere to flow; akin to Greek phlyzein to boil over
Date: 1603
1.
a. : having particles that easily move and change their relative position without a separation of the mass and that easily yield to pressure : capable of flowing
b. : subject to change or movement
boundaries became fluid
2. : characterized by or employing a smooth easy style
the ballerina's fluid movements
fluid recitation of his lines
3.
a. : available for various uses
a fluid computer program
b. : liquid 4
fluid assets
• flu·id·ly adverb
• flu·id·ness noun
II. noun
Date: 1661
: a substance (as a liquid or gas) tending to flow or conform to the outline of its container
• flu·id·al ˈflü-ə-d ə l adjective
• flu·id·al·ly -d ə l-ē adverb
• flu·id·like -ˌlīk adjective