- almost Runge-Kutta method
- almost significant
- almost simple algebraic group
- almost simple form
- almost simple group
- almost solvable group
- almost split mapping
- almost split sequence
- almost splitting extension
- almost splitting sequence
- almost step function
- almost subharmonic function
- almost summability
- almost sure
- almost sure convergence
- almost surely
- almost surely convergent
- almost symplectic manifold
- almost symplectic structure
- almost triangular matrix
- almost uniform convergence
- almost uniformly convergent
- almost unit
- almost zero
- alpha-algebra