A pool or lake.
- Being nothing more than what is specified: a mere child; a mere 50 cents an hour.
- Considered apart from anything else: shocked by the mere idea.
- Small; slight: could detect only the merest whisper.
- Obsolete Pure; unadulterated.
- A small lake, pond, or marsh: "Sometimes on lonely mountain meres/I find a magic bark” ( Tennyson).
- Archaic A boundary.