What is the meaning of Simple?

Uncomplicated; lacking complexity; taken by itself, with nothing added.

Easy; not difficult.

Without ornamentation; plain.

Free from duplicity; guileless, innocent, straightforward.

Undistinguished in social condition; of no special rank.

Trivial; insignificant.

Feeble-minded; foolish.

Structurally uncomplicated.

1. Consisting of one single substance; uncompounded.
2. Of a group: having no normal subgroup.
3. Not compound, but possibly lobed.
4. Using steam only once in its cylinders, in contrast to a compound engine, where steam is used more than once in high-pressure and low-pressure cylinders.
5. Consisting of a single individual or zooid; not compound.

   Consisting of one single substance; uncompounded.

   Of a group: having no normal subgroup.

   Not compound, but possibly lobed.

   Using steam only once in its cylinders, in contrast to a compound engine, where steam is used more than once in high-pressure and low-pressure cylinders.

   Consisting of a single individual or zooid; not compound.

   Homogenous.

   Mere; not other than; being only.

   A herbal preparation made from one plant, as opposed to something made from more than one plant.

   A physician.

   A simple or atomic proposition.

   Something not mixed or compounded.

   A drawloom.

   Part of the apparatus for raising the heddles of a drawloom.

   A feast which is not a double or a semidouble.

   To gather simples, i.e. medicinal herbs.

   simple (uncomplicated)

   simple (uncomplicated)

   single (not divided into parts)

   simple

   Alternative form of symple

   Alternative form of symple

   definite singular of simpel

   plural of simpel

   definite singular of simpel

   plural of simpel

   innocent

   mere; simple

   honest; without pretense

   peasant, pauper (attributive)

   simply

   single (multiplier)

   simple

   one-way

   mere

   one-way ticket

   single

   simple

   inflection of simpel:

   1. strong/mixed nominative/accusative feminine singular
   2. strong nominative/accusative plural
   3. weak nominative all-gender singular
   4. weak accusative feminine/neuter singular

   strong/mixed nominative/accusative feminine singular

   strong nominative/accusative plural

   weak nominative all-gender singular

   weak accusative feminine/neuter singular

   vocative masculine singular of simplus

   feminine/neuter plural nominative/accusative of simplu

   simple (uncomplicated)

   mere, ordinary

   simple, single (not divided into parts)

   simple-minded, stupid

   insipid, flavorless

   simple

   simpleton, fool

   simple

   definite natural masculine singular of simpel

   simple; easy to do

   common; ordinary

   easy to understand

   simple; plain

   simple

   Source: wiktionary.org