(grammar) The present tense; a verb or sentence in this tense.

Uncomplicated; taken by itself, with nothing added. / Without ornamentation; plain. / Free from duplicity; guileless, innocent, straightforward. / Undistinguished in social condition; of no special rank.

(pharmacology) A herbal preparation made from one plant, as opposed to something made from more than one plant. / (obsolete, by extension) A physician. / (logic) A simple or atomic proposition.

(transitive, intransitive, archaic) To gather simples, i.e. medicinal herbs.

(grammar) A tense used to describe something that happened in the past, formed by the inflection of a single word, without any auxiliary verb such as be or have.

Single, simple; not complex. / (telecommunications) Unidirectional.

(geometry, algebraic topology) An analogue in a space of arbitrary dimensionality of the triangle or tetrahedron; the convex hull of n+1 linearly independent points in n-dimensional space; in other words, the triangle, tetrahedron etc., generalized to an arbitrary number of dimensions.

(manner) In a simple way or state; considered in or by itself; without addition; alone. / (manner) Plainly; without art or subtlety / (manner) Foolishly; stupidly. / (focus) Merely; solely.

Overly simple. / In a manner that simplifies a concept or issue so that its nuance and complexity are lost or important details are overlooked.

(physics, engineering) A device that only requires the application of a single force to work. / Used other than figuratively or idiomatically: see simple, machine.