Definitions:

1. Indicates a minimal change, difference, or effect. ADVERB
   • The water was slightly warm, inviting me to take a dip.
2. Used to describe something that is done to a small degree or extent. ADVERB
   • The car skidded slightly on the wet pavement, but the driver regained control.
3. With reference to a person's build, in a slender way. ADVERB
   • She's a slightly built girl.

Synonyms:

• barely
• just
• more or less
• narrowly
• slenderly
• slimly
• somewhat