1. Moderately warm
   "tepid bath water"
   - lukewarm 
2. Feeling or showing little interest or enthusiasm
   - halfhearted, half-hearted, lukewarm

See also: tepidness, unenthusiastic, warm

• Third Baron Rayleigh
• third base
• third baseman
• third battle of Ypres
• third class
• Third Council of Constantinople
• third cranial nerve
• Third Crusade
• third deck
• third degree
• third dimension
• Third Epistel of John
• third estate
• third eye
• third eyelid
• third gear
• third house
• Third Lateran Council
• third law of motion
• third law of thermodynamics
• third man
• third party
• third person
• third power
• third rail