1. In actuality or reality or fact
   "in effect, they had no choice"
   - effectively

1. Exerting force or influence
   "the law is already in effect (or in force)"
   - effective, good, in force

See also: operative

• fullerene
• fullness
• fully
• fully fashioned
• fully fledged
• fully grown
• fulmar
• fulmar petrel
• Fulmarus
• Fulmarus glacialis
• fulminant
• fulminate
• fulminate of mercury
• fulminating mercury
• fulmination
• fulminic acid
• fulness
• fulsome
• fulsomely
• fulsomeness
• Fulton
• fulvic acid
• Fulvicin
• fulvous
• Fumaria